Find the time required for a 50 Hz alternating current to change its value from zero to the rms value .

The r.m.s.value of an alternating current is

The ratio of peak value and r.m.s. value of an alternating current is

What is peak value and r.m.s. value of alternating current?

The following table shows the frequency distribution of the time required for each worker to complete a work. From the table find the mean time required to complete the job for a worker.

The peak value of an alternating voltage is 350 V. Calculate its r.m.s. value.

Practice problems : Find the temperature at which its value in Fahrenheit will be nearly equal to its value in Kelvin .

The frequency of an alternating voltage is 50 cycles//sec and its amplitude is 120V. Then the r.m.s. value of voltage is

The peak value of alternating voltage is 423 V. Its root mean square value is

If the rms current in a 50 Hz AC rircuit is 5A the value of the current 1/300 seconds after its value becomes zero is

The r.m.s.value of an alternating current of 50 Hz frequency is 10A.The time taken by the A.C.current in reading from zero to maximum value and the peak value of current will be