If an AC main supply is given to be `220V`. What would be the average e.m.f during a positive half cycle?

If an a.c. main supply is given to be 220V, the average e.m.f. during a positive half cycle will be

For a given AC source the average emf during the positive half cycle

A 220 V, 50 Hz a.c. source is being used. What is the average e.m.f over a full cycle ? What is the rmx voltage ?

The peak value of an alternating e.m.f. is 141.4 V. What would be the reading of an a.c. voltmeter when connected across this e.m.f. ?

The average emf during the positive half cycle of an ac supply of peak value E_(0) is .

A step down transformer connected to an ac mains supply of 220V is made to operate at 11V, 44W lamp. Ignoring power losses in the transformer what is the current in primary circuit.