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Physics - section - 10
  1. Which tube used to produce X-ray?

    2. A.

     Coolidge tube
    B.

     X-ray tube
    C.

     Roentgen
    D.

     None of these

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  2. A Fuse wire is characterised by

    3. A.

     High resistance and low melting point
    B.

     High resistance and high melting point
    C.

     Low resistance and high melting point
    D.

     Low resistance and low melting point

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  3. When the main switch of the house is put off it disconnects the

    4. A.

     Live wire only
    B.

     Live wire and the earth wire
    C.

     Live wire and the neutral wire
    D.

     Earth wire and the neutral wire

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  4. Electric power is measured in units of

    5. A.

     Volt
    B.

     Joule
    C.

     Watt
    D.

     Ampere

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  5. Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.

    6. A.

     12500
    B.

     20
    C.

     40
    D.

     6250

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  6. What is the value of 1 kW = ?

    7. A.

     1000 W
    B.

     10 W
    C.

     100 W
    D.

     10000 W

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  7. The electric current in a metal wire is due to the flow of -

    8. A.

     Electrons
    B.

     Protons
    C.

     Ions
    D.

     Holes

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  8. An electric fuse is based on

    9. A.

     The chemical effect of the current
    B.

     The magnetic effect of the current
    C.

     The heating effect of the current
    D.

     All of the above

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  9. Metals are good conductors of electricity because

    10. A.

     The atoms are lightly packed
    B.

     They contain free electrons
    C.

     They have high melting point
    D.

     All the above

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  10. Find the current (in A) when a charge of 1200C flows in 6 seconds.

    11. A.

     7200
    B.

     200
    C.

     100
    D.

     3600

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