Figure shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.

How are the electrical appliances connected in a house circuit: in series or in parallel? Give reason.

An electric iron of power 1.5 kW is used for 30 minutes to press clothes. Calculate the electrical energy consumed in:

(a) kilowatt hour

(b) joule

Assuming the electric consumption per day to be 12 kWh and the rate of electricity to be Rs 6.25 per unit, find how much money is to be paid in a month of 30 days?