Question

A magnetic field is directed normally downwards through a magnetic frame as shown in the figure. On increasing the magnetic field:

Answer 1

**Hint : **Using the Faraday's law we find voltage generated by charging a magnet with wires coiled around it and magnetic lines flowing from south to north and current from negative to positive. The faraday’s law is defined in terms of formula as:
Emf $=-N\dfrac{d\phi }{dt}$
where N is the number of turns, B is the external magnetic field, and A is the area of the coil. And the negative sign denotes Lenz’s law.

Complete step by step solution:
Faraday's law is a fundamental relationship with Maxwell's equations. It states numerous ways in which the induced voltage or emf that is generated is generated due to the movement of particles in an magnetic environment. The induced emf is negative due to rate of change of magnetic flux, magnetic number of turns in the coil. Hence, when the magnetic frame is moving in the magnetic field, an induced current is produced in anticlockwise direction and with the magnetic lines moving into the paper, the plate B be positively charged to A which will be negatively charged.

**Note : **
Lenz’s law is a process which moves the core with coil forwards and backward, forward when magnetic field passes from South pole to North Pole and backward when current supplied is backward.