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

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

Two identical electric lamps marked 500 W , 220 V are connected in series and then joined to a 110 V line. The power consumed by each lamp is

Two identical electric lamps marked 500 W , 220 V are connected in series and then joined to a 110 V line. The power consumed by each lamp is

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?