Advertisements
Advertisements
प्रश्न
State Lenz’s law.
Advertisements
उत्तर
Lenz’s law states that the direction of the induced current is such that it always opposes the cause responsible for its production.
APPEARS IN
संबंधित प्रश्न
A metal rod `1/sqrtpi `m long rotates about one of its ends perpendicular to a plane whose magnetic induction is 4 x 10-3 T. Calculate the number of revolutions made by the rod per second if the e.m.f. induced between the ends of the rod is 16 mV.
The phenomenon of electromagnetic induction is
Describe different ways to induce current in a coil of wire.
In which of the following case does the electromagnetic induction occur?
The current is stopped in a wire held near a loop of wire .
A light metal disc on the top of an electromagnet is thrown up as the current is switched on. Why? Give reason.
Using Ampere's law, obtain an expression for the magnetic induction near a current-carrying straight infinitely long wire.
An alternating emf of 0.2 V is applied across an L-C-R series circuit having R = 4Q, C = 80µF, and L = 200 mH. At resonance the voltage drop across the inductor is
There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is slowly changing into a circular loop in the plane of the paper. Then ______.
What should be the core of an electromagnet?
