Alternating Cur...

The potential difference V and the current iflowing through an instrument in an ac circuit of frequency f are given by V = 5 cosωt volts and I = 2 sin ωt amperes (where w = 2 πf). The power dissipated in the instrument is

If instantaneous current is given by i = 4 cos (ωt + Φ)) amperes, then the r.m.s. value of current is

A generator produces a voltage that is given by V = 240 sin 120 t, where t is in seconds. The frequency and r.m.s. voltage are

If E₀ represents the peak value of the voltage in an ac circuit, the r.m.s. value of the voltage will be

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

200 V, 50 Hz, ac is applied to a resistor. The instantaneous value of voltage is

The r.m.s. value of an ac of 50 Hz is 10 amp. The time taken by the alternating current in reaching from zero to maximum value and the peak value of current will be

The root mean square value of the alternating current is equal to

In general in an alternating current circuit