Electricity consumption bill is based on the measurement of –

Which of the following is the best conductor of electricity?

Which of the following liquids is a bad conductor of electricity?

Which one of the following solutions is not capable of conducting electricity?

The heating element in an electric iron is usually made of

15 bulbs, each of 200 watt capacity in a Silkyata tunnel are illuminated continuously for 24 hours. The consumption of electricity will be -