Derive an expression for the heat produced in time t in a wire of resistance R, which is carrying a current i.

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

Derive an expression for the torque acting or a current carrying loop which subtends angle with uniform magnetic field.

Derive an expression for the torque acting on a current carrying loop suspended in a uniform magnetic field.

When current passes through resistor due to its resistive property heat is produced. Error in measurement of resistance, current and time is 1%, 2% and 1% respectively, then what will be percentage error in measurement of heat energy ?

How is heat produced by an electric current?

Consider an infinitely long wire carrying a current I(t), with (dI)/(dt)=lambda = constant. Find the dt current produced in the rectangular loop of wire ABCD if its resistance is R as in figure.

Heat produced in a resistance wire of resistance R on passing current is H cal/sec.Then current through resistor = ...... A.

Derive the formula of the heat energy produced in the conductor because of electric current flows in it for the relax time-interval .t.. Give its unit.

There are two wires. One of them carries a current . How will you find out which one carries a current ?