Chapter 11 : Electricity
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The energy consumed by a 1000 W appliance in 1 hour is:
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The heating effect of current is undesirable in:
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Which of the following is a good conductor of electricity?
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The formula R = ρl/A shows that resistance depends on:
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The resistance of a wire increases with increase in:
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Which quantity is represented by the symbol “R”?
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A fuse wire should have:
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Electric energy consumed is given by:
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If two resistors are connected in parallel, the equivalent resistance:
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If two resistors are connected in series, the total resistance:
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Heat produced in a resistor depends on:
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Which law gives the relation between heat produced and current?
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The direction of conventional current is:
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The work done to move a unit charge is called:
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A device used to change resistance in a circuit is:
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Which of the following has maximum resistance?
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The resistance of an ideal conductor is:
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Current through a conductor is directly proportional to:
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Which device protects electrical circuits from overloading?
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The filament of an electric bulb is made of:
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A 100 W bulb consumes more energy than a 60 W bulb because it:
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The formula for electric power is:
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One watt is equal to:
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SI unit of electric power is:
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Electric power is the rate of:
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Which appliance converts electrical energy into heat energy?
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Electric fuse works on the principle of:
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Heating effect of electric current is based on:
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Equivalent resistance in parallel combination is always:
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Equivalent resistance in series combination is:
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In a parallel combination, voltage across each resistor is:
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In a series combination of resistors, current remains:
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The SI unit of resistivity is:
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If the length of a wire is doubled, its resistance becomes:
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Resistance of a conductor depends on:
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One kilowatt-hour is equal to:
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The commercial unit of electrical energy is:
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Voltmeter is always connected in:
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Current is measured by connecting an ammeter in:
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Which of the following obeys Ohm’s law?
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The reciprocal of resistance is called:
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Which material is commonly used for heating elements?
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A conductor with high resistance produces more:
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Resistance is measured in:
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The formula of Ohm’s law is:
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Ohm’s law states that at constant temperature:
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What is the SI unit of potential difference?
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The flow of electric charge through a conductor is called:
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Which instrument is used to measure electric current?
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What is the SI unit of electric current?
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