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General Knowledge :: Physics

  1. The fuse in an electric circuit is connected in

  2. A.

     Series with neutral

    B.

     Parallel to live

    C.

     Parallel to neutral

    D.

     Series with live


  3. Working of safety fuses depends upon
    1. magnetic effect of the current
    2. chemical effect of the current
    3. magnitude of the current
    4. heating effect of the current
    Select the correct answer using the code given below.

  4. A.

     1, 2, 3 and 4

    B.

     1, 2 and 3 only

    C.

     3 and 4 only

    D.

     4 only


  5. During thunderstorm you are travelling in a car. To protect yourself from the lightning you will have to

  6. A.

     Remain in the car

    B.

     Get out of the car and lie flat in the ground

    C.

     Abandon the car and take shelter under a nearby tree

    D.

     Touch the nearest electric pole


  7. The unit of electrical power is

  8. A.

     Bolt

    B.

     Watt

    C.

     Kilowatt hour

    D.

     Ampere


  9. Safety fuse wire used in domestic electrical appliances is made of metal of low

  10. A.

     Resistance

    B.

     Melting point

    C.

     Specific gravity

    D.

     Conductance


  11. The best conductor of electricity among the following is :

  12. A.

     Copper

    B.

     Iron

    C.

     Aluminium

    D.

     Silver


  13. Kilowatt-hour is the unit of :

  14. A.

     Energy

    B.

     Power

    C.

     Force

    D.

     Momentum


  15. Copper wires are generally used for electrical power transmission instead of iron wire because :

  16. A.

     Copper is cheaper than iron

    B.

     Copper is lighter than iron

    C.

     Copper is a better conductor of electricity than iron

    D.

     Copper can take higher power than iron


  17. The earth-wire of a cable is connected to

  18. A.

     The outer metallic body of the appliance

    B.

     The fuse of the appliance

    C.

     The filament of the appliance

    D.

     Short circuitry of the appliance


  19. Lightning is caused due to

  20. A.

     Electric power

    B.

     Electric discharge

    C.

     Electric leak

    D.

     Electric pressure