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Current Electricity - section-1
  1. You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect

    2. A.

     Two in parallel
    B.

     Two in parallel and one in series
    C.

     Three in parallel
    D.

     Three in series

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  2. Which of the following materials has a negative temperature coefficient of resistance?

    3. A.

     Copper
    B.

     Aluminum
    C.

     Carbon
    D.

     Brass

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  3. Which of the following material has nearly zero temperature coefficient of resistance?

    4. A.

     Manganin
    B.

     Porcelain
    C.

     Carbon
    D.

     Copper

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  4. Conductance: mho ::

    5. A.

     Resistance : ohm
    B.

     Capacitance : Henry
    C.

     Inductance : farad
    D.

     lumen : steradian

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  5. The thickness of insulation provided on the conductor depends on

    6. A.

     The magnitude of voltage on the conductor
    B.

     The magnitude of current flowing through it
    C.

     Both (A) and (B)
    D.

     None of the above

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  6. All good conductors have high

    7. A.

     Conductance
    B.

     Resistance
    C.

     Reluctance
    D.

     Thermal conductivity

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  7. What will be energy used by the battery if the battery has to drive 6.28 x 10¹⁸ electrons with potential difference of 20 V across the terminal ?

    8. A.

     5 joules
    B.

     10 joules
    C.

     15 joules
    D.

     20 joules

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  8. Which is the best conductor of electricity?

    9. A.

     Iron
    B.

     Silver
    C.

     Copper
    D.

     Carbon

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  9. Heat in a conductor is produced on the passage of electric current due to

    10. A.

     reactance
    B.

     capacitance
    C.

     impedance
    D.

     resistance

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  10. Resistance of carbon filament lamp as the applied voltage increases.

    11. A.

     Increases
    B.

     Decreases
    C.

     Remains same
    D.

     None of the above

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