1. In a uniform magnetic field B, a wire in the form of a semicircle of radius r rotated about the diameter of the circle with angular frequency ‘ω’. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R the mean power generated per period of rotation is :

2. The role of inductance is equivalent to:

3. A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 rad s^-1. If the horizontal component of earth's magnetism is 2 × 10^-5 T, then e.m.f. developed between the two ends of the conductor is:

4. coil of L = 8.4 mH and R = 6 Ω is connected to a 12 V battery. The current in the coil is 1.0 A at approx'time of:

5. If I current is flowing inductance L, then the dimension of \(\frac{3}{2}\) LI² is equivalent to:

6. The phase difference between the flux linkage and the emf in a rotating coil in a uniform magnetic field is:

7. A choke is used as a resistance in :

8. The SI unit of magnetic flux is:

9. For purely capacitive circuits, power factor is:

10. The magnetic flux linked with a coil is inversely proportional to the?