Derive an expression for the force per unit length between two infinitely long straight parallel current carrying wires. Hence, define one ampere (A).

Obtain equation for force between two parallel currents carrying wire.

Explain experiment which produced magnetic field due to straight long current carrying wire.

Define Ampere from two current carrying parallel wires.

Derive an expression for elastic potential energy per unit volume stored for the wire is 1/2 x stress x strain.

The wires which connect the battery of an automobile to its starting motor carry a current of 300 A (for a short time). What is the force per unit length between the wires if they are 70 cm long and 1.5 cm apart? Is the force attractive or repulsive?

The wires which connect the battery of an automobile to its starting motor carry a current of 300a (for a short time). What is the force per unit length between the wires if they are 70cm long and 1.5 cm apart? IS the force attractive or repulsive?

A square (each side of length L) wire loop is kept with a long straight wire carrying current I. The emf induced in the square loop is _____

Equal currents are passing through two very long and straight parallel wires in the same direction. They will _______ .

(a) Obtain an expression for the mutual inductance between a long straight wire and a square loop of side a as shown in figure. (b) Now assume that the straight wire carries a current of 50 A and the loop is moved to the right with a constant velocity, v = 10 m/s. Calculate the induced emf in the loop at the instant when x = 0.2 m. Take a = 0.1 m and assume that the loop has a large resistance.

Obtain the expression of electric field by a straight wire of infinite length and with linear charge density lambda .