Question

State Ampere’s circuital theorem and apply it to find the magnetic field inside a (i) solenoid (ii) toroid State the Principle of a potentiometer and Explain how is it used (i) to determine the internal resistance of a primary cell (ii) to compare the emfs of two primary cells State Kirchhoff’s laws and apply it to derive Wheatstone’s bridge principle

Answer 1

Ampere circuital Law states that line is integral of magnetic field around any closed circuits or path determined.

This includes MO times and ranges the total current flowing and spread through the closed path.

It determines the relationship between the current and the magnetic field caused by it as the law says the integral of magnetic field.

Answer 2

here is your answer OK



A solenoid bent into the form of a closed ring is called a toroidal solenoid. Alternatively, it is an anchor ring around which a large number of turns of a metallic wire are wound. We shall see that the magnetic field B→ has a constant magnitude everywhere inside the toroid while it is zero in the open space interior (point P) and exterior (point Q) to the toroid.

The direction of the magnetic field inside is clockwise as per the right-hand thumb rule for circular loops. Three circular Amperean loops as shown by dashed lines. By symmetry, the magnetic field should be tangential to them and constant in magnitude for each of the loops.