JEE Mains Moving Charges and Magnetism

Test Preparation on JEE Mains Moving Charges and Magnetism Paper (I)-2018

1.

The power factor of an AC circuit having resistance (R) and inductance (L) connected in series and an angular velocity ω is-

1a
2b
3c
4d

2.

1zero
2RvB
3vBL/R
4-vBL

3.

13.66 H
29 H
30.66 H
41 H.

4.

In a transformer, the number of turns in the primary coil is 140 and that in the secondary coil is 280. If the current in the primary coil is 4 A, then that in the secondary coil is [2002]

14 A
22 A
36 A
410 A.

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