A sinusoidal alternating current of peak value `(I_0)` passes through a heater of resistance R. What is the mean power output of the heater?

An alternating current of rms value 5A, passes through a resistance of 24 Omega . What is the maximum P.D. across the resister?

If alternating current of rms value ‘a’ flows through resistance R then power loss in resistance is-

A sinusoidal ac current flows through a resistor of resistance R . If the peak current is I_(p) , then the power dissipated is

A sinusoidal ac current flows through a resistor of resistance R . If the peak current is I_(p) , then the power dissipated is

A sinusoidal ac current flows through a resistor of resistance R . If the peak current is I_(p) , then the power dissipated is

A battery of emf E and internal resistance r is connected across a pure resistive device (such as an electric heater) or resistance R. Prove that the power output of the device will be maximum if R = r .