Question

State ampere's circuital theorem and apply it to find the magnetic field inside a / solenoid / toroid state the principle of a potentiometer and explain how is it used. /to determine the internal resistance of a primary cell / to compare the emfs of two primary cells state krichoffs laws and aplly it to derive wheat's stone bridge principle

Answer 1

Ampere circuit law :
It states that the line integral of magnetic inductionin a loop is equal to algebraic sum of current that passes through the loop .

The files that I had attached in which I had derived the application of magnetic field using ampere circuit law for both solenoid and toroid is useful to you.