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General Knowledge :: Physics

  1. Quality of transmission depends upon

  2. A.

     Nature of signal only

    B.

     Nature of medium only

    C.

     Both (A) and (B)

    D.

     Neither A nor B


  3. Circuit breaker usually operate under

  4. A.

     After D. C. component has ceased

    B.

     Transient state of short-circuit current

    C.

     Sub-transient state of short-circuit current

    D.

     Steady state of short-circuit current


  5. The resistance of the human body (dry condition) is of the order of

  6. A.

     101 Ohm

    B.

     102 Ohm

    C.

     103 Ohm

    D.

     None of these


  7. Which component of an IED creates an electrical charge?

  8. A.

     Activator

    B.

     Fuse

    C.

     Explosive

    D.

     Power source


  9. A multimeter is used to measure

  10. A.

     Current

    B.

     Voltage

    C.

     Resistance

    D.

     All of the above


  11. Which of the following was the first theory of superconductivity?

  12. A.

     Ginzburg Landau theory

    B.

     London theory

    C.

     Resonating valence bond theory

    D.

     Quantum field theory


  13. A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be

  14. A.

     P

    B.

     < P

    C.

     > P

    D.

     2P


  15. A wire carrying current is

  16. A.

     Positively charged

    B.

     Negatively charged

    C.

     Neutral

    D.

     Charged with a type depending upon current strength


  17. Carbon Arc lamps are commonly used in

  18. A.

     Cinema projectors

    B.

     Photography

    C.

     Vehicles

    D.

     Domestic lighting


  19. Low voltage cables are meant for use up to

  20. A.

     3.3 kV

    B.

     1.1 kV

    C.

     11 kV

    D.

     0.5 kV