Current Electricity questions
395 published questions with worked solutions.
- Which one of the following formulas does not represent electrical power ?
- Three equal resistors are connected in parallel configuration in a closed electrical circuit. Then the total resistance in the...
- The device used to produce electric current is known as
- An electric wire of resistance 50 ohm is cut into five equal wires. These wires are then connected in parallel. What is the...
- What is the current required to light a 60 W incandescent bulb in a domestic supply of 240 V ?
- Two resistors R_1 and R_2 arranged in parallel combination in an electrical closed circuit are made of the same material and of...
- An electric bulb is connected to 220 V generator. The current drawn is 600 mA. What is the power of the bulb?
- A current of 0·6 A is drawn by an electric bulb for 10 minutes. Which one of the following is the amount of electric charge that...
- Which one of the following terms cannot represent electrical power in a circuit?
- In an electric circuit, a wire of resistance 10 Ω is used. If this wire is stretched to a length double of its original value,...
- An electric bulb is rated as 220 V and 80 W. When it is operated on 110 V, the power rating would be :
- The potential difference between the two end terminals of an electric heater is 220 V and the current through it is 0·5 A. What...
- The heating element in an electric iron is usually made of
- Which of the following statements are correct about the electrical resistance and resistivity of a wire ? 1. Both quantities...
- If the current through an electrical machine running on direct current is 15 A and the machine runs for 10 minutes, the charge...
- Which one of the following is primarily responsible for conduction of current in a metal ?
- Two resistances of 5·0 Ω and 7·0 Ω are connected in series and the combination is connected in parallel with a resistance of 36·0...
- An incandescent electric bulb converts 20% of its power consumption into light, and the remaining power is dissipated as heat....
- If three resistors of 1 Ohm each connect in parallel to each other the resultant resistance is
- Two conducting wires made of the same material have lengths L and 1·2 L. If the volume of the longer wire is half that of the...
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