Electricity - 02
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Q.1. The p.d. across a 3 Ω resistor is 6 V. The current flowing in the resistor will be : *
1 point
Q.2. A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is : *
1 point
Q.3. An electrical appliance has a resistance of 25 . When this electrical appliance is connected to a 230 V supply line, the current passing through it will be : *
1 point
Q.4. When a 4 ohm resistor is connected across the terminals of a 12 V battery, the number of coulombs passingthrough the resistor per second is : *
1 point
Q.5. Ohm’s law gives a relationship between : *
1 point
Q.6. The unit of electrical resistance is : *
1 point
Q.7. The substance having infinitely high electrical resistance is called : *
1 point
Q.8. Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become : *
1 point
Q.9. Keeping the p.d. constant, the resistance of a circuit is halved. The current will become : *
1 point
Q.10. Keeping the resistance constant, the potential difference applied across the ends of a component is halved. By how much does the current change ? *
1 point
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