An electric lamp is marked 60 W , 230 V . The cost of a 1 kWh of energy is Rs . 1.25. The cost of using this lamp 8 hrs a day for 30 day is

An electric lamp is marked 60 W , 230 V . The cost of 1 kilowatt hour of power is Rs . 1.25. The cost of using this lamp for 8 hours is

An electric lamp is marked 60 W, 240 V. If it operats at 200, V the current through it will be

An electric lamp is marked 100 W, 220 V. If it operates at 200 V, the current through it will be :

An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours?

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?

A lamp is marked 60 W, 220 V. If it operates at 200 V, the rate of consumption of energy will

A lamp is marked 60 W, 220 V. If it operates at 200 V, the rate of consumption of energy will :

An electrical lamp os marked 240 V - 60 W . What is the resistance of the lamp on incandescent state ?

An electric refrigerator rated 400 W is used for 8 hours a day. An electric iron box rated 750 W is used for 2 hours a day. Calculate the cost of using these appliances for 30 days, if the cost of I kWh is Rs 3/-.