A coil having n turns and resistance 4R Ω is connected in a circuit with a resistor R Ω . This combination is moved in time t seconds from a magnetic - Physics MCQ AIEEE 2004 2026 | ExamTest.live

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A coil having n turns and resistance 4 R Ω is connected in a circuit with a resistor R Ω . This combination is moved in time t seconds from a magnetic flux W_{1} weber to W_{2} weber. The induced current in the circuit is:

Solution & Step-by-step Explanation

The induced emf in a coil of n turns is: ε = - n \frac{Δ ϕ}{Δ t} = - n \frac{W _{2} - W _{1}}{t} The total resistance of the circuit is R_{t o t a l} = R_{co i l} + R = 4 R + R = 5 R .According to Ohm's Law, the induced current is: I = \frac{ε}{R _{t o t a l}} = - \frac{n ( W _{2} - W _{1} )}{5 Rt}

Try it yourself before checking the explanation above.

A coil having n turns and resistance 4 R Ω is connected in a circuit with a resistor R Ω . This combination is moved in time t seconds from a magnetic flux W_{1} weber to W_{2} weber. The induced current in the circuit is:

\frac{W _{2} - W _{1}}{5 R n t}

- \frac{n ( W _{2} - W _{1} )}{5 Rt}

\frac{W _{2} - W _{1}}{R n t}

- \frac{n ( W _{2} - W _{1} )}{Rt}

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