Basic electrical MCQ #5


1) An electric current is the ______.
     (a) opposition to electrons.
     (b) flow of electrons.
     (c) storage of charge.
     (d) ionisation of atom.

2) The frequency of direct current (DC) is ______.
     (a) zero.
     (b) 50 Hz.
     (c) unity.
     (d) infinity.

3) The number of cycle per second is called as ______.
     (a) time period.
     (b) frequency.
     (c) angular displacement.
     (d) angular velocity.

4) Reciprocal of the conductance is called
     (a) resistance.
     (b) admittance.
     (c) reluctance.
     (d) reactance.

5) Which of the following is not a passive component?
     (a) Inductor.
     (b) Resistor.
     (c) Capacitor.
     (d) None of the above.



ANSWER: | 1-b | 2-a | 3-b | 4-a | 5-d |

6) In voltaic cell, anode and cathode of the cell is 
      (a) copper electrode, zincb. 
      (b) zinc, copperc. 
      (c) aluminium, zincd. 
      (d) nickel, cobalt

7) What is the function of insulation on a current carrying conductor?
     (a) to prevent shock.
     (b) to prevent leakage of current.
     (c) both of above factors.
     (d) none of above factors.

8) Ohm’s law is not applicable to
     (a) linear circuits.
     (b) high voltage circuits.
     (c) carbon resistors.
     (d) vacuum tubes.

9) Lenz’s law is a consequence of the law of coservation of
     (a) energy.
     (b) charge.
     (c) mass.
     (d) momentum.

10) The unit for permeability of free space is?
      (a) Henry
      (b) Henry-m
      (c) Henry/m
      (d) Henry/m2



ANSWER: | 6-a | 7-c | 8-d | 9-a | 10-c |

11) The unit of reluctance is?
      (a) AWb
      (b) A2/Wb
      (c) Wb/A
      (d) A/Wb

12) As the magnetic flux density increases, the reluctance _____________
      (a) Decreases
      (b) Increases
      (c) Becomes zero
      (d) Remains the same

13) The equivalent of the current (I) in magnetic ohm’s law is?
      (a) MMF
      (b) Reluctance
      (c) Flux
      (d) Resistance

14) The B-H characteristics can be determined using _______
      (a) Flux meter
      (b) Ammeter
      (c) Voltmeter
      (d) Multimeter

15) In case of Inductive circuit, Frequency is ______________ to the inductance.
      (a) Much greater than
      (b) Inversely proportional
      (c) Unrelated
      (d) Directly proportional



ANSWER: | 11-d | 12-a | 13-c | 14-a | 15-d |

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