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Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.

In a house two 60W electric bulbs are lighted for 4 hours, and three 100 W bulbs for 5 hours everyday. Calculate the electric energy consumed in 30 days.

Fig. shows two resistors A of 4 Omega and B of 6 Omega joined in series to a battery of e.m.f. 12 V and internal resistance 2 Omega . Calculate : the electrical energy spent in 1 minute in resistor A

An electrical appliance is rated 1500 W, 250 V. This appliance is connected to mains of voltage 250 V for 60 hour. Calculate : the cost of electrical energy consumed at a rate of 4.50 per kWh.

The rating of an electric heater is1100 w, 220V calculate the resistance when it operates at 220 v, also calculate the energy consumed in kwh in the month of November, if the heater is used daily for 4 hours at the rated voltage.

Pranith recived an electric bill for the month of April. He started verifying it by calculating the electrical energy consumed by a 2000 W electrical appliance that is used for two hours every day in his workshop. In his house he used bulbs of 100 W for 4 hours every day in the month of april, which con-sumes the same electrical energy as that of the elec-trical appliance in the work shop. Find the number of bulbs Panith uses in his house.

An electric bulb is rated 220V and 100 W. what is its resistance? Five such bulbs burn for 4 hours. What is the electrical energy consumed? Calculate the cost if the rate is 50 paise per unit.