Question

1. A circular coil of radius 5 cm has 50 turns of wire. The uniform magnetic field directed into the page/screen (see the figure below) is linearly increased in magnitude form 0 to 0.8 T. What time interval for this increase is needed to induce in the coil emf = 0.25 V? What is the direction of the induced emf (clockwise/conterclockwise)?

To solve this problem I used

1. The Coulomb’s law;
2. The Snall’s law;
3. The Faradey’s law;
4. The Lentz’s law;
5. A and B;
6. C and D.

Answer 1

Faraday's law is used for determining the induced emf in the coil having changing magnetic flux through it.so from it we can determine the value of time interval.

Now for determining direction of induced current

lenz law is used

Option F is correct