An electric heater of 1000W is used for 2 hours a day. What is the cost of using it for a month of 28 days, if 1 unit costs ? 3.00 ?

An electric bulb of 100 W is used for 9 hours per day. What will be the units of energy consumed in 1 day by the bulb?

An electric refrigerator rated 400 V operates 8 hour//day. What is the cost of the energy to operate it for 30 days at Rs. 3.00 per kWh ?

Two electric bulbs of 100W each are used for 8 hours daily. Find the cost of using them for 1 day if the rate is 75 paise per unit

An electric heater of 1200 W is operated for 3 hrs daily. What will be the electrical consumption expenses for that in the month of June ? (The electric company charges Rs 5 per unit of energy.) Analyse Step 1 : To get the electrical consumption expenses of the month of June, we need to know the energy consumed by the electric heater in that month in terms of units. Step 2 : Key factors to understand : i. To find the expenses, "Electrical consumption expenses "="Energy consumed (in units)"xx"charge per unit " ii. "1 unit "="1 kWh" i.e. in order to find the energy inunit, we need to find it in terms of kWh (kilowatt hour)

An electric lamp of 100 watt is used for hours per day. The 'units' of energy consumed in one day by the lamp is

An electric heater draws a current of 10A from a 220V supply. What is the cost of using the heater for 5 hours everyday for 30 days if the cost of 1 unit (1 kWh) is Rs 5.20?