Chapter 12 Electricity – Page 6 – HI MCQ!

An electric fuse works on the?

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The potential at a point is 20V. The work done to bring a charge of 0.5 C from infinity to this point will be?

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Consider The Following Statements And Choose The Incorrect One?

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The resistance of a wire is inversely proportional to the square of its diameter.
Short length of a thick wire is used for getting low resistance; and long length of a thin wire is used for getting high resistance.
A thick wire has more resistance; and a thin wire has less resistance.
The resistance of all pure metals increases on raising the temperature; and decreasing on lowering the temperature.

One coulomb charge is equivalent to the charge contained in?

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Three equal resistances when combined in series are equivalent to 90w. Their equivalent resistance when combined in parallel will be?

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For which of the following substances, resistance decreases with temperature?

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A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross-section?

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A cylindrical conductor of length l and uniform area of cross section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross- section?

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What is the maximum resistance which can be made using five resistors each of 1/5 ohm?

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100 J of heat is produced each second in a 4ohm resistor. The potential difference across the resistor will be?

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