Obtain the formula for the power loss in a conductor of resistance R and carrying a current I.

Write an expression for the amount of heat produced in a wire of resistance R and carrying a current I for time. An electric heater of resistance 10 ohm draws 15 A from the service mains for 2 hours. Calculate the power of the heater.

Write an expression for the amount of heat produced in a wire of resistance R and carrying a current I for time. An electric heater of resistance 10 ohm draws 15 A from the service mains for 2 hours. Calculate the heat developed in the heater?

Obtain an expression for the power in a.c. circuit containing a resistance and capacitance in series.

Derive an expression for the maximum force experieced by a straight conductor of length 'l', carrying current 'I' and kept in a uniform magnetic field B.

Derive an expression for the maximum force experienced by a straight conductor of length 'l', carrying current 'I' and kept in a uniform magnetic field B.

State the relationship between the power P, consumed by a device, its resistance R and current I, flowing through it An electric iron of resistance 20 ohm takes a current of 5A.Calculate its electric power?

State the relationship between the power P, consumed by a device, its resistance R and current I, flowing through it An electric iron of resistance 20 ohm takes a current of 5A.Calculate the heat generated by it in 30 seconds.

State the Biot-Savart's law for the magnetic field due to a current carrying element. Use this law to obtain a formula for magnetic field at athe centre of circular loop of radius r carrying steady current I . Sketch the magnetic field lines for a current loop clearly indicating the direction of the field.

State the formula correlating the electric current flowing in a conductor and in voltage applied across it also, show this relationship by drawing a graph. What would be the resistance of a conductor if the current flowing throught it is 0.35 ampere when the potential difference across it is 1.4 volt.