Current Electricity(Electrical Engineering ) Questions and Answers

Question 1. The minimum charge on an ion is
  1.    Equal to the atomic number of the atom
  2.    Equal to the charge of an electron
  3.    Equal to the charge of the number of electrons in an atom
  4.    Zero
Explanation:-
Answer: Option B. -> Equal to the charge of an electron
Question 2. Resistance of a material always decreases if
  1.    Temperature of material is decreased
  2.    Temperature of material is increased
  3.    Number of free electrons available becomes more
  4.    None of the above is correct
Explanation:-
Answer: Option C. -> Number of free electrons available becomes more
Question 3. Current velocity through a copper conductor is
  1.    the same as propagation velocity of electric energy
  2.    independent of current strength
  3.    of the order of a few micro m/s
  4.    nearly 3 x 108 m/s
Explanation:-
Answer: Option C. -> of the order of a few micro m/s
Question 4. The rating of a fuse wire is always expressed in
  1.    Ampere-hours
  2.    Ampere-volts
  3.    kWh
  4.    Amperes
Explanation:-
Answer: Option D. -> Amperes
Question 5. For which of the following 'ampere second' could be the unit?
  1.    Reluctance
  2.    Charge
  3.    Power
  4.    Energy
Explanation:-
Answer: Option B. -> Charge
Question 6. Which method can be used for absolute measurement of resistances?
  1.    Lorentz method
  2.    Raleigh method
  3.    Ohm's law method
  4.    Wheatstone bridge method
Explanation:-
Answer: Option D. -> Wheatstone bridge method
Question 7. Conductance is reciprocal of
  1.    Resistance
  2.    Inductance
  3.    Reluctance
  4.    Capacitance
Explanation:-
Answer: Option A. -> Resistance
Question 8. A field of force can exist only between
  1.    Two molecules
  2.    Two ions
  3.    Two atoms
  4.    Two metal particles
Explanation:-
Answer: Option B. -> Two ions
Question 9. In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains
  1.    Length of heating element should be decreased
  2.    Length of heating element should be increased
  3.    Length of heating element has no effect on heating if water
  4.    None of the above
Explanation:-
Answer: Option A. -> Length of heating element should be decreased
Question 10. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is
  1.    6.4 A, 6.9 A
  2.    6.4 A, 9.6 A
  3.    4.6 A, 6.9 A
  4.    4.6 A, 9.6 A
Explanation:-
Answer: Option B. -> 6.4 A, 9.6 A
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