What is the frequency of household supply of a.c. in India?

A series LCR circuit with R= 20 Omega ,L=1.5H and C = 35 muF is connected to a variable-frequency 200 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?

A series LCR circuit with R = 20Omega (Ohm), L = 1,5H (Henry) and C= 35muF (Micro farad) is connected to a variable frequency 200 V (Volt) a.c. supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle ?

A household supply of a.c. in India has a peak value of 311 V and a frequency of 50 Hz. Write the equation to represent the same.

The frequency of an ac supply is doubled, what happens to inductive reactance X_L and capacitive reactance X_c ?

An alternating em.f is applied to a pure indutance such that inductive reactance is 10 ohm. If the frequency of a.c. Is doubled, the reactance will become

A series LCR-circuit having L = 10 mH, C = (400//pi^2)muF and R = 55 ohm is connected to a 220 V variable frequency a.c. supply. Find the frequecy of the source, for which the average power absorbed by the circuit is maximum.