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General Knowledge :: Physics

  1. For which of the following substances, the resistance decreases with increase in temperature?

  2. A.

     Pure silicon

    B.

     Copper

    C.

     Nichrome

    D.

     Platinum


  3. The S.I. unit of electric charge is :

  4. A.

     Ampere

    B.

     Coulomb

    C.

     E.s.u

    D.

     Kelvin


  5. Indicate the false statement about the resistance of a wire

  6. A.

     It depends on material of wire

    B.

     It is directly proportional to the length of wire

    C.

     It is directly proportional to the area of cross-section of wire

    D.

     Resistance of metallic wire increases with increase in temperature


  7. The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:

  8. A.

     Avogadro's law

    B.

     Rault's law

    C.

     Ohms law

    D.

     Faraday's law


  9. What is the SI unit of electric current?

  10. A.

     Newton

    B.

     Joule

    C.

     Ampere

    D.

     Watt


  11. The rate of flow of electric charge is measured in

  12. A.

     Ampere

    B.

     Coulomb

    C.

     Ampere/coulomb

    D.

     Ampere-coulomb


  13. A device which is used to limit the current in an electrical circuit is called a

  14. A.

     Grid

    B.

     Fuse

    C.

     Hub

    D.

     Conductor


  15. Materials that allow electricity to flow are called

  16. A.

     Insulators

    B.

     Conductors

    C.

     Electron flows

    D.

     Stimulators


  17. The fundamental scientific principle in the operation of battery is

  18. A.

     Acid-base interaction

    B.

     Dialysis

    C.

     Dissociation of electrolytes

    D.

     Oxidation-reduction


  19. If the current flowing through a circuit is 0.6 A for 6 mins, the amount of electric charge flowing through it is ________

  20. A.

     360C

    B.

     216 C

    C.

     60 C

    D.

     36 C