The magnetic flux linked with a coil, in webers, is given by the equations Φ = 3t² + 4t + 9. Then
the magnitude of induced e.m.f. at t = 2 second will be

As shown in the figure, a magnet is moved with a fast speed towards a coil at rest. Due to this
induced electromotive force, induced current and induced charge in the coil is E, I and Q
respectively. If the speed of the magnet is doubled, the incorrect statement is

Lenz’s law is a consequence of the law of conservation of:

The self inductance of a toroid is :

The flux linked with a coil at any instant ‘t’ is given by Φ = 10t² – 50t + 250. The induced emf at t = 3 s is :

A copper rod AB of length L, pivoted at one end A, rotates at constant angular velocity ω, at right angles to a uniform magnetic field of induction B. The e.m.f developed between the mid point C of the rod and end B is :

A coil having 500 square loops each of side 10 cm is placed normal to a magnetic flux which increases at the rate of 1.0 Tesla/second. The induced e.m.f. in volts is :

The adjoining figure shows two bulbs B1 and B2 resistor R and an inductor L. When the switch S is turned off :

A wire is bent to form the double loop shown in figure. There is a uniform magnetic field directed into the plane of the loop. If the magnitude of this field is decreasing, current will flow from :-

A conducting rod is moved with a constant velocity v in a magnetic field. A potential difference appears across the two ends