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Current Electricity Questions

Practice 130 Current Electricity questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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31
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78
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21
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Practice by Exam:Physics(128)PHYSICS(2)

About Current Electricity — practice questions, PYQs & concepts

Current Electricity is a frequently-tested topic on Physics, PHYSICS. ExamTest.live currently lists 130 Current Electricity questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Current Electricity weight in competitive exams

Across our Current Electricity question bank, the largest sources are Physics (128) and PHYSICS (2). Click any exam chip above to drill down to that exam-specific question set.

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All Current Electricity Questions(1–100 of 130)

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Q1easymcqPhysicsAIEEE 20042026
0% accuracy
The electrochemical equivalent of a metal is per coulomb. The mass of the metal liberated at the cathode when a current is passed for will be:
Q2mediummcqPhysicsAIEEE 20042026
0% accuracy
The thermo emf of a thermocouple varies with the temperature of the hot junction as in volts where the ratio is . If the cold junction is kept at , then the neutral temperature is:
Q3easymcqPhysicsAIEEE 20042026
0% accuracy
In a metre bridge experiment, a null point is obtained at from one end of the wire when resistance is balanced against another resistance . If , then where will be the new position of the null point from the same end, if one decides to balance a resistance of against ?
Q4easymcqPhysicsAIEEE 20042026
0% accuracy
Alternating current cannot be measured by a D.C. ammeter because:
Q5easymcqPhysicsAIEEE 20042026
50% accuracy
In a LCR circuit, capacitance is changed from to . For the resonant frequency to remain unchanged, the inductance should be changed from to:
Q6mediummcqPhysicsAIEEE 20042026
0% accuracy
An electric current is passed through a circuit containing two wires of the same material connected in parallel. If the length and radii of the wires are in the ratio of and , then the ratio of the currents passing through the wires will be:
Q7mediummcqPhysicsAIEEE 20042026
0% accuracy
In an LCR series a.c. circuit, the voltage across each of the components, and is . The voltage across the combination will be:
Q8mediummcqPhysicsAIEEE 20042026
0% accuracy
Time taken by a heater to heat one litre of water from to is:
Q9mediummcqPhysicsAIEEE 20042026
0% accuracy
A battery is connected to a network of resistors. If the equivalent resistance of the network is , the total current supplied by the battery is:
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Q10easymcqPhysicsAIEEE 20042026
0% accuracy
Thermistors are usually made of:
Q11mediummcqPhysicsAIEEE 20042026
0% accuracy
The resistance of the series combination of two resistances is . When they are joined in parallel, the total resistance is . If , then the minimum possible value of is:
Q12mediummcqPhysicsAIEEE 20062026
0% accuracy
The current drawn from the source in the following circuit is:
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Q13easymcqPhysicsAIEEE 20062026
0% accuracy
Kirchhoff’s first law () and second law () are respectively based on the conservation of:
Q14easymcqPhysicsNEET 20192026
0% accuracy
Which of the following acts as a circuit protects device?
Q15easymcqPhysicsNEET (UG) 20172026
0% accuracy
The resistance of a wire is ‘ ’ ohm. If it is melted and stretched to ‘ ’ times its original length, its new resistance will be:
Q16mediummcqPhysicsAIEEE 20062026
0% accuracy
The resistance of a bulb filament is at a temperature of . If its temperature coefficient of resistance be per , its resistance will become at a temperature of:
Q17mediummcqPhysicsNEET 20192026
0% accuracy
In the circuits shown below, the readings of voltmeters and the ammeters will be:
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Q18mediummcqPhysicsAIEEE 20062026
0% accuracy
In a Wheatstone’s bridge, three resistances and are connected in three arms and the fourth arm is formed by two resistances and connected in parallel. The condition for the bridge to be balanced is:
Q19easymcqPhysicsNEET (UG) 20172026
0% accuracy
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves:
Q20hardmcqPhysicsNEET 20192026
0% accuracy
Six similar bulbs are connected as shown in the figure with a DC source of emf and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be:
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Q21mediummcqPhysicsAIEEE 20072026
0% accuracy
The resistance of a wire is at and at . The resistance of the wire at will be:
Q22easymcqPhysicsAIEEE 20062026
0% accuracy
An electric bulb is rated . The power consumed by it when operated on will be:
Q23hardmcqPhysicsAIEEE 20062026
0% accuracy
An inductor (), a resistor () and a battery () are connected in series. After a long time, the battery is disconnected after short-circuiting. The current in the circuit after the short-circuit is:
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Q24mediummcqPhysicsAIEEE 20062026
0% accuracy
A material has twice the specific resistance (resistivity) of . A circular wire made of has twice the diameter of a wire made of . For the two wires to have the same resistance, the ratio of their respective lengths must be:
Q25mediummcqPHYSICSNEET 20192026
The metre bridge shown is in a balanced position with . If we now interchange the position of the galvanometer and the cell, will the bridge work? If yes, what will be the balanced condition?
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Q26easymcqPhysicsNEET 2020 E12026
Which of the following graph represents the variation of resistivity () with temperature () for copper?
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Q27mediummcqPhysicsNEET 2020 E12026
The color code of a resistance is given as: Yellow, Violet, Brown, Gold. The values of resistance and tolerance, respectively, are:
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Q28mediummcqPhysicsNEET (UG) 20242026
A wire of length ' ' and resistance is divided into equal parts. The first parts are connected in series while the next parts are connected in parallel. The two combinations are again connected in series. The resistance of this final combination is:
Q29easymcqPhysicsNEET 2020 E12026
The solids which have the negative temperature coefficient of resistance are:
Q30mediummcqPhysicsAIEEE 20122026
Two electric bulbs marked and are connected in series to a supply. Which of the bulbs will fuse?
Q31mediummcqPhysicsNEET 20212026
The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is . What will be the effective resistance if they are connected in series?
Q32hardmcqPhysicsNEET 2020 E12026
A resistance wire connected in the left gap of a metre bridge balances a resistance in the right gap at a point which divides the bridge wire in the ratio . If the length of the resistance wire is , then the length of of the resistance wire is:
Q33mediummcqPhysicsNEET 20212026
Column-I gives certain physical terms associated with flow of current through a metallic conductor. Column-II gives some mathematical relations involving electrical quantities. Match Column-I and Column-II with appropriate relations.
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Q34mediummcqPhysicsNEET 20212026
Three resistors having resistance , and are connected as shown in the given circuit. The ratio of currents in terms of resistances used in the circuit is:
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Q35mediummcqPhysicsNEET 20232026
The resistance of a platinum wire at is and at . The temperature coefficient of resistance of the wire is:
Q36easymcqPhysicsNEET 20222026
As the temperature increases, the electrical resistance:
Q37mediummcqPhysicsJEE Main2026
Statement- I: Higher the range, greater is the resistance of ammeter.Statement- II: To increase the range of ammeter, additional shunt needs to be used across it.
Q38hardmcqPhysicsNEET 20222026
A copper wire of length and radius has electrical resistance of . The current density in the wire for an electric field strength of is:
Q39hardmcqPhysicsNEET 20222026
A Wheatstone bridge is used to determine the value of unknown resistance by adjusting the variable resistance . For the most precise measurement of , the resistances and :
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Q40mediummcqPhysicsFIITJEE AIEEE 2011 (Set Q)2026
A resistor and capacitor in series is connected through a switch to direct supply. Across the capacitor is a neon bulb that lights up at . Calculate the value of to make the bulb light up after the switch has been closed. ()
Q41easymcqPhysicsNEET 20232026
Resistance of a carbon resistor determined from colour codes is . The colour of the third band must be:
Q42easymcqPhysicsNEET 20232026
resistors, each of resistance , are connected in series to a battery of EMF and negligible internal resistance. When they are instead connected in parallel to the same battery, the current increases times. The value of is:
Q43mediummcqPhysicsAIEEE2026
Two conductors have the same resistance at but their temperature coefficients of resistance are and . The respective temperature coefficients of their series and parallel combinations are nearly:
Q44hardmcqPhysicsAIEEE2026
A battery ( internal resistance) and a battery ( internal resistance) are connected in parallel to a resistor. The current in the resistor is:
Q45easymcqPhysicsNEET (UG) 20242026
The terminal voltage of the battery, whose emf is and internal resistance , when connected through an external resistance of as shown in the figure, is:
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Q46mediummcqPhysicsNEET (UG) 20242026
A capacitor is connected to a source. The peak current in the circuit is nearly ():
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Q47easymcqPhysicsNEET (UG) 20242026
Choose the correct circuit which can achieve the bridge balance.
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Q48mediummcqPhysicsNEET (UG) 20242026
Two heaters A and B have power rating of and , respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is:
Q49mediummcqPhysicsAIEEE 20032026
The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the:
Q50mediummcqPhysicsAIEEE 20092026
This question contains Statement-1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements.
Statement 1: The temperature dependence of resistance is usually given as . The resistance of a wire changes from to when its temperature is increased from to . This implies that .
Statement 2: is valid only when the change in the temperature is small and .
Q51mediummcqPhysicsJEE Main2026
The supply voltage to a room is . The resistance of the lead wires is . A bulb is already switched on. What is the decrease of voltage across the bulb, when a heater is switched on in parallel to the bulb?
Q52mediummcqPhysicsAIEEE 20032026
An ammeter reads up to . Its internal resistance is . To increase the range to , the value of the required shunt is:
Q53mediummcqPhysicsAIEEE 20032026
A battery with negligible internal resistance is connected in a circuit as shown. (Circuit consists of three resistors, two in parallel, then in series with the third). The current in the circuit will be:
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Q54mediummcqPhysicsAIEEE 20032026
A , bulb is connected across a mains supply. The power consumed will be:
Q55easymcqPhysicsAIEEE 20032026
A strip of copper and another of germanium are cooled from room temperature to . The resistance of:
Q56hardmcqPhysicsAIEEE2026
Current enters at point A and leaves at point D of a conducting block. To find the voltage between points B and C, we assume current spreads over a hemispherical surface. The electric field at distance is . The potential difference is:
Q57mediummcqPhysicsAIEEE2026
Shown in the figure is a meter-bridge setup with null deflection in the galvanometer. One resistor is and the balancing length from left is . The value of the unknown resistor on the right side is:
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Q58mediummcqPhysicsAIEEE 20032026
The thermo e.m.f. of a thermo-couple is at room temperature. A galvanometer of resistance, capable of detecting current as low as , is connected with the thermocouple. The smallest temperature difference that can be detected by this system is:
Q59mediummcqPhysicsNEET 20172026
A potentiometer is an accurate and versatile device to make electrical measurements of , because the method involves:
Q60mediummcqPhysicsNEET 20172026
Figure shows a circuit contains three identical resistors with resistance each, two identical inductors with inductance each, and an ideal battery with emf . The current ' ' through the battery just after the switch closed is:
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Q61hardmcqPhysicsNEET 20172026
A long solenoid of diameter has turns per meter. At the centre of the solenoid, a coil of turns and radius is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to from in . If the resistance of the coil is , the total charge flowing through the coil during this time is:
Q62easymcqPhysicsNEET 20172026
The resistance of a wire is ‘ ’ ohm. If it is melted and stretched to ‘ ’ times its original length, its new resistance will be:
Q63mediummcqPHYSICSNEET 20192026
The reading of an ideal voltmeter in the circuit shown is:
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Q64hardmcqPhysicsAIEEE 20032026
The length of a given cylindrical wire is increased by . Due to the consequent decrease in diameter, the percentage change in the resistance of the wire will be:
Q65mediummcqPhysicsNEET 20232026
The magnitude and direction of the current in the following circuit is:
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Q66mediummcqPhysicsAIEEE 20032026
In an oscillating circuit the maximum charge on the capacitor is . The charge on the capacitor when the energy is stored equally between the electric and magnetic field is:
Q67mediummcqPhysicsNEET 2020 E12026
A charged particle having drift velocity of in an electric field of , has a mobility in of:
Q68mediummcqPhysicsAIEEE 20032026
The length of a wire of a potentiometer is , and the e.m.f. of its standard cell is volt. It is employed to measure the e.m.f. of a battery whose internal resistance is . If the balance point is obtained at from the positive end, the e.m.f. of the battery is:
Q69easymcqPhysicsNEET (UG) 20182026
A carbon resistor of is to be marked with rings of different colours for its identification. The colour code sequence will be:
Q70mediummcqPhysicsNEET 20212026
In a potentiometer circuit a cell of EMF gives balance point at length of wire. If another cell of EMF replaces the first cell, then at what length of the wire, the balance point occurs?
Q71mediummcqPhysicsAIEEE 20122026
The figure shows an experimental plot for discharging of a capacitor in an R-C circuit. The time constant of this circuit lies between:(Note: Graph shows at , at , at )
image
Q72hardmcqPhysicsNEET (UG) 20182026
A set of ' ' equal resistors, of value ' ' each, are connected in series to a battery of emf ' ' and internal resistance ' '. The current drawn is . Now, the ' ' resistors are connected in parallel to the same battery. Then the current drawn from battery becomes . The value of ' ' is:
Q73easymcqPhysicsNEET 20222026
Two resistors of resistances, and are connected in parallel in an electrical circuit. The ratio of thermal energy developed in to that in in a given time is:
Q74mediummcqPhysicsFIITJEE AIEEE 2011 (Set Q)2026
If a wire is stretched to make it longer, its resistance will:
Q75mediummcqPhysicsNEET 20232026
If the galvanometer does not show any deflection in the circuit shown, the value of is:
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Q76mediummcqPhysicsNEET (UG) 20182026
A battery consists of a variable number ' ' of identical cells (having internal resistance ' ' each) which are connected in series. The terminals of the battery are short-circuited and the current is measured. Which of the graphs shows the correct relationship between and ?
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Q77mediummcqPhysicsNEET (UG) 20182026
Current sensitivity of a moving coil galvanometer is and its voltage sensitivity (angular deflection per unit voltage applied) is . The resistance of the galvanometer is:
Q78hardmcqPhysicsPhysics
6% accuracy
A wire of resistance is cut into equal pieces. From these pieces two equivalent resistances are made by adding four of these together in parallel. Then these two sets are added in series. The net effective resistance of the combination is:
Q79mediummcqPhysicsPhysics
11% accuracy
The current passing through the battery in the given circuit is:

image
Q80mediummcqPhysicsPhysics
3% accuracy
A constant voltage of is maintained between the points A and B of the circuit shown in the figure. The current through the branch CD of the circuit is:

image
Q81mediummcqPhysicsPhysics
0% accuracy
If power dissipated in the resistor in the circuit shown is , the potential difference across the resistor is:
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Q82mediummcqPhysicsPhysics
0% accuracy
A current of flows through a resistor when connected across a battery. The same battery supplies a current of when connected across a resistor. The internal resistance of the battery is:
Q83mediummcqPhysicsPhysics
0% accuracy
The rate of increase of thermo e.m.f. with temperature at the neutral temperature of a thermocouple:
Q84mediummcqPhysicsPhysics
A cell with emf and internal resistance is connected to variable . Plot of potential difference across vs is:
image
Q85hardmcqPhysicsPhysics
In a circuit, the current through a resistor is when the points and are connected to a d.c. voltage source. The potential difference between the points and is:
Q86mediummcqPhysicsPhysics
A ring is made of a wire having a resistance . Find the points and , as shown in the figure, at which a current carrying conductor should be connected so that the resistance of the sub circuit between these points is equal to .image
Q87mediummcqPhysicsPhysics
In the circuit shown the cells and have negligible resistances. For and the galvanometer () shows no deflection. The value of is:
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Q88mediummcqPhysicsPhysics
The power dissipated across the resistor in the circuit shown here is . The power dissipated in watt units across the resistor is :(Assume a circuit where the and resistors are in parallel, and their combination is in series with a resistor)
image
Q89hardmcqPhysicsPhysics
An electric kettle takes current at . How much time will it take to boil of water from temperature ? The temperature of boiling water is .
Q90easymcqPhysicsPhysics
If voltage across a bulb rated drops by of its rated value, the percentage of the rated value by which the power would decrease is:
Q91mediummcqPhysicsPhysics
A milli voltmeter of range is to be converted into an ammeter of range. The value (in ohm) of necessary shunt will be:
Q92hardmcqPhysicsPhysics
A current of flows through the resistor shown in the circuit. The power dissipated in the resistor is:
Q93easymcqPhysicsPhysics
A wire of resistance is stretched to twice its original length. The resistance of the stretched wire would be:
Q94easymcqPhysicsPhysics
The internal resistance of a cell which gives a current of through a resistance of is:
Q95hardmcqPhysicsPhysics
For ensuring dissipation of same energy in all three resistors () connected as shown in figure, their values must be related as:

image
Q96easymcqPhysicsPhysics
Kirchhoff’s first and second laws for electrical circuits are consequences of:
Q97hardmcqPhysicsPhysics
A galvanometer of resistance is connected to a battery of along with a resistance of in series. A full scale deflection of divisions is obtained in the galvanometer. In order to reduce this deflection to divisions, the resistance in series should be:
Q98mediummcqPhysicsPhysics
The resistances of the four arms in a Wheatstone bridge are respectively. The e.m.f. is and internal resistance is . What is the current drawn from the cell?
Q99easymcqPhysicsPhysics
Two cities are apart. Electric power is sent from one city to another city through copper wires. The fall of potential per is and the average resistance per is . The power loss in the wire is:
Q100hardmcqPhysicsPhysics
Consider an electric circuit consisting of two batteries with emfs and internal resistances connected in parallel with an external resistance . If and are currents through the respective branches, which of the following Kirchhoff equations is correct?
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