Electric current in a solid metal conductor is caused by the movement of what ?

Related Mcqs:

1. A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is _____________________?

   A. F=1/B
   B. F=1/Bsinθ
   C. F/0
   D. F=1/Bcosθ

2. Production of heat due to an electric current flowing through a conductor is given by _________________?

   A. Joule effect
   B. Joule Thomsons effect
   C. Comptons effect
   D. Feed back effect

3. The current through a metallic conductor is due to the motion of _________________?

   A. free electrons
   B. protons
   C. neutrons
   D. still under controversy

4. If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________?

   A. 3600C
   B. 7200C
   C. 1C
   D. 2C

5. Forward current through a semi conductor diode circuit is due to____________?

   A. minority carriers
   B. majority carriers
   C. holes
   D. electron

6. Resistance of a conductor depends upon_________________?

   A. nature of conductor
   B. dimension of conductor
   C. physical state of the conductor
   D. all of above

7. Resistance of a super conductor is ______________________?

   A. finite
   B. infinite
   C. zero
   D. changes with every conductor

8. The resistance of a conductor at absolute zero (OK) is________________?

   A. zero almost
   B. infinite almost
   C. no prediction at all
   D. may increase or decrease

9. Semi-conductor germanium and silicon are_________________?

   A. pentavalent
   B. trivalent
   C. divalent
   D. tetravalent

10. The specially designed semi-conductor diodes used as fast counters in electronic circuits are_______________?

    A. The light emitting diodes
    B. Photo diodes
    C. Photo voltaic cell
    D. Solar cells.