The main power supply in India is at 220 V, whereas that in the US is at 110 V. Which one among the following statements in this regard is correct?

Which one among the following statements regarding India's coal is. not correct?

With regard to the powers of the Rajya Sabha, which one among the following statements is not correct?

The rating of an electric lamp is 110V. To use it one 220V, one will have to use which one of the following?

A 3-pin mains plug is fitted to the cable for a 1 kW electric kettle to be used on a 250 V a.c. supply. Which of the following statement is not correct ?

Which one among the following statements with regard to the National Security Council (NSC) of India is not correct?

In India domestic power supply is at 220 V, 50Hz. While in USA it is 110 V, 50 Hz. Given one advantage and one disadvantage of 220 V supply over 110 V supply.

In India, domestic power suppy is at 220 V, 50 hz, while in U.S.A, its 110 V, 60 hz. Give one advantage and one disadvantage of 220 V supply over 110 V supply.