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MOVING COIL GALVANOMETER MCQs

Total Questions : 27 | Page 2 of 3 pages
Question 11. What type of device converts mechanical energy into electrical energy?
  1.    solenoid
  2.    electric motor
  3.    transformer
  4.    generator
 Discuss Question
Answer: Option D. -> generator
Question 12. A plant generating electric current
  1.    transmits alternating current at high voltages, but is used at low voltages
  2.    transmits direct current at high voltages, but is used at low voltages
  3.    transmits alternating current at low voltages, but used at high voltages
  4.    transmits direct current at low voltages, but used at high voltages
 Discuss Question
Answer: Option A. -> transmits alternating current at high voltages, but is used at low voltages
Question 13. Currents of 10 A and 2 A are flowing in opposite directions through two parallel wires A and B respectively
  1.    8 x 10 ^ -5 N
  2.    6 x 10 ^-5 N
  3.    4 x 10 ^ -5 N
  4.    2 X 10 ^ -5 N
 Discuss Question
Answer: Option A. -> 8 x 10 ^ -5 N
Question 14. In moving coil galvanometer, the pole faces of U-shaped magnet are made concave
  1.    to make the field radial
  2.    to increase the field
  3.    to weaken the field
  4.    both (a) and (b)
 Discuss Question
Answer: Option A. -> to make the field radial
Question 15. What type of equipment is used to measure the current induced when a wire passes through a magnetic field?
  1.    a transformer
  2.    a galvanometer
  3.    a generator
  4.    an insulated wire
 Discuss Question
Answer: Option B. -> a galvanometer
Question 16. When current running through a wire is placed in the field of a permanent magnet,
  1.    solar energy is transformed into light
  2.    electrical energy is transformed into sound
  3.    solar energy is transformed into mechanical energy
  4.    electrical energy is transformed into mechanical energy
 Discuss Question
Answer: Option D. -> electrical energy is transformed into mechanical energy
Question 17. To reverse current direction in a motor the conducted current goes
  1.    through the commutator to the armature
  2.    through the armature
  3.    through the brushes to the commutator
  4.    in the direction of rotation
 Discuss Question
Answer: Option C. -> through the brushes to the commutator
Question 18. What type of device can increase and decrease voltage?
  1.    Generators
  2.    Transformers
  3.    Galvanometers
  4.    Electric motors
 Discuss Question
Answer: Option B. -> Transformers
Question 19. In a certain region of space, electric field E and magnetic field B are perpendicular to each other
  1.    E/B
  2.    B/E
  3.    E x B
  4.    E.B
 Discuss Question
Answer: Option A. -> E/B
Question 20. A deuteron of kinetic energy 50 keV is describing a circular orbits of radius 0
  1.    25 keV
  2.    50 keV
  3.    200 keV
  4.    100 keV
 Discuss Question
Answer: Option D. -> 100 keV

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