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प्रश्न
What is ‘Rating’ of an electric appliance?
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उत्तर
Rating of an electric appliance indicates energy consumed per second or watt when connected to a supply of given voltage.
संबंधित प्रश्न
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?
(a) Rs 12
(b) Rs 24
(c) Rs 36
(d) Rs 48
Write an expression for the electrical power spent in flow of current through a conductor in terms of
(a) Resistance and potential difference, (b) current and resistance.
State the S.I. unit of electrical power.
Why is the electric power from the generating station transmitted at high voltage?
An electric heater is rated 220 V, 550 W. Calculate the electrical energy consumed in 3 hours?
I ampere of current is passed through a resistor of resistance R ohm for time t second. Obtain expression for
(i) the electrical energy, and
(ii) the electrical power spent.
A family uses a light bulb of 100W, a fan of 100W, and a heater of 1000W, each for 8 hours a day. If the cost of electricity is Rs. 2 per unit, what is the expenditure to the family per day, on electricity?
