To find the r.m.s value of an alternating current mathematically we need to have ________________?

Related Mcqs:

An alternating current or voltage_____________________?

A. fluctuates off and on B. varies in magnitude alone C. changes its direction again and again D. changes its magnitude harmonically and reverses its direction of flow after regularly recurring intervals...

An electromagnetic wave consists of _____________________?

A. Electric and magnetic fields moving parallel to each other B. Magnetic field moving with velocity of light in space C. Electric field moving with velocity of light D. Electric and magnetic fields moving perpendicular to each other...

What is the self-inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1 ?

A. 0.5 mH B. 0.5H C. 2.0H D. 8.0H...

A 10Ω electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ?

A. 220V B. 220/ 2V C. 110V D. 220 √2V...

A choke is used as a resistance in_________________?

A. DC circuit B. AC circuits C. Both AC and DC circuit D. Full wave rectifier circuit...