Magnetic Flux - NEET Physics Questions
Question 1: moderate

Some magnetic flux is changed from a coil of resistance 10 ohm. As a result an induced
current is developed in it, which varies with time as shown in figure. The magnitude of
change in flux through the coil in webers is:

1. 2
2. 4
3. 6
4. 8
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Question 2: moderate

Two coils are at fixed locations. When coil 1 has no current and the current in coil 2 increases at the rate 15.0 A/s the emf in coil 1 in 25.0 mV, when coil 2 has no current and coil 1 has a current of 3.6 A, the flux linkage in coil 2 is:

1. 16 mWb
2. 10 mWb
3. 4.00 mWb
4. 6.00 mWb
View Answer

Based on the problem in your editor, here is the solution in 3 lines without using the $ symbol:

  1. Find Mutual Inductance (M): M = Induced EMF / (rate of change of current) = 25.0 mV / 15.0 A/s = 1.667 mH.

  2. Calculate Flux Linkage: Flux = M × Current = 1.667 mH × 3.6 A = 6.00 mWb.

  3. Result: The flux linkage in coil 2 is 6.00 mWb (Option 4).