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Long. (2) What Urterom below the anLong Answer Type Question20. (a) What is meant by "electric power" ? Write the formula for electric power in terms of potential diffeand current.(b) The diagram below shows a circuit containing a lamp L, a voltmeter and an ammeter. The volreading is 3 V and the ammeter reading is 0.5 A.(i) What is the resistance of the lamp ?(in) What is the power of the lamp ?(c) Define kilowatt-hour. How many joules are there in one kilowatt-hour ? 3(d) Calculate the cost of operating a heater of 500 W for 20 hours at the rate of 3.90 per uni- 20 hours at the top 3.6667

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