Home Tests Search Rank Profile

Power Questions

Practice 20 Power questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

📚

20

Total Questions

🟢

4

Easy

🟡

13

Medium

🔴

3

Hard

Practice by Exam:Physics(20)

About Power — practice questions, PYQs & concepts

Power is a frequently-tested topic on Physics. ExamTest.live currently lists 20 Power 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.

Power weight in competitive exams

Across our Power question bank, the largest sources are Physics (20). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

Start easy: 4 easy Power questions are available — build fluency before moving up.
Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
Time yourself: Every question shows the average solve time so you can benchmark your speed against other students.
Read every explanation: Even on questions you got right — the explanation often surfaces a faster approach you can reuse.

All Power Questions(1–20 of 20)

Filter:

Q1mediummcqPhysicsAIEEE 20072026

0% accuracy

In an a.c. circuit the voltage applied is E = E_{0} sin ω t . The resulting current in the circuit is I = I_{0} sin (ω t - \frac{π}{2}) . The power consumption in the circuit is given by:

Q2easymcqPhysicsAIEEE 20062026

0% accuracy

An electric bulb is rated 220 V - 100 W . The power consumed by it when operated on 110 V will be:

Q3hardmcqPhysicsNEET 20192026

0% accuracy

Six similar bulbs are connected as shown in the figure with a DC source of emf E 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:

Q4mediummcqPhysicsAIEEE 20122026

Two electric bulbs marked 25 W - 220 V and 100 W - 220 V are connected in series to a 440 V supply. Which of the bulbs will fuse?

Q5hardmcqPhysicsAIEEE 20032026

A body is moved along a straight line by a machine delivering a constant power. The distance moved by the body in time t is proportional to:

Q6mediummcqPhysicsAIEEE 20032026

A 220 volt, 1000 watt bulb is connected across a 110 volt mains supply. The power consumed will be:

Q7mediummcqPhysicsAIEEE2026

A body of mass m is accelerated uniformly from rest to a speed v in a time T . The instantaneous power delivered to the body as a function time is given by:

Q8mediummcqPhysicsNEET (UG) 20242026

Two heaters A and B have power rating of 1 kW and 2 kW, 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:

Q9mediummcqPhysicsNEET 20212026

Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input energy. How much power is generated by the turbine? (g = 10 m/s^{2})

Q10mediummcqPhysicsNEET 20212026

The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when it delivers the power of 3.3 \times 1 0^{- 3} watt will be (h = 6.6 \times 1 0^{- 34} Js):

Q11easymcqPhysicsPhysics

Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 volt and the average resistance per km is 0.5 Ω . The power loss in the wire is:

Q12easymcqPhysicsPhysics

If voltage across a bulb rated 220 Volt - 100 Watt drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is:

Q13mediummcqPhysicsPhysics

i = sin (100 π t) and e = sin (100 π t + π /3) . Average power in Watts is:

Q14mediummcqPhysicsPhysics

A car starts from rest and accelerates so that instantaneous power delivered is constant (P_{0}). The instantaneous velocity is proportional to:

Q15easymcqPhysicsPhysics

The power dissipated in the circuit shown (two 10 Ω resistors in parallel connected to R in series, 10 V battery) is 30 Watts . The value of R is:

Q16mediummcqPhysicsPhysics

A source S_{1} is producing 1 0^{15} photons per second of wavelength 5000 \overset{˚}{A} . Another source S_{2} is producing 1.02 \times 1 0^{15} photons per second of wavelength 5100 \overset{˚}{A} . Then (power of S_{2})/(power of S_{1}) is equal to:

Q17mediummcqPhysicsPhysics

An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s . The mass per unit length of water in the pipe is 100 kg/m . What is the power of the engine?

Q18mediummcqPhysicsPhysics

Power dissipated in an LCR series circuit connected to an a.c source of emf ϵ is:

Q19hardmcqPhysicsPhysics

A current of 3 A flows through the 2 Ω resistor shown in the circuit. The power dissipated in the 5 Ω resistor is:

Q20mediummcqPhysicsPhysics

The total power dissipated in watts in the circuit shown here is:

Frequently Asked Questions

How many Power questions are on ExamTest.live?▼

We have 20 Power questions spread across 1 pages, covering easy, medium, and hard difficulty levels with detailed explanations.

Are Power MCQs free?▼

Yes. All Power questions, answers, and explanations on ExamTest.live are completely free. No account or subscription required.

Which exams include Power questions?▼

Power questions are commonly asked in Physics. You can filter by exam using the links above.

How do I practice Power questions effectively?▼

Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.