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MOVING COIL GALVANOMETER MCQs

Total Questions : 27 | Page 3 of 3 pages
Question 21. To convert a moving coil galvanometer into on ammeter of given range, we must connect:
  1.    A suitable low resistance in series
  2.    A suitable low resistance in parallel
  3.    A suitable high resistance in parallel
  4.    A suitable high resistance in series
 Discuss Question
Answer: Option B. -> A suitable low resistance in parallel
Question 22. Two wires of same length are shaped into a square and a circle if they carry same current, ratio of magnetic moment is :
  1.    2 : pi
  2.    pi: 2
  3.    pi: 4
  4.    4:pi
 Discuss Question
Answer: Option C. -> pi: 4
Question 23. An electric current passes through a long straight copper wire
  1.    B/6
  2.    B/4
  3.    B/3
  4.    B/2
 Discuss Question
Answer: Option B. -> B/4
Question 24. A wire in the form of a circular loop, of one turn carrying a current, produces magnetic induction B at the centre
  1.    B
  2.    2B
  3.    4B
  4.    8B
 Discuss Question
Answer: Option C. -> 4B
Question 25. What type of device converts electrical energy into mechanical energy
  1.    electric motors
  2.    generator
  3.    transformers
  4.    galvanometer
 Discuss Question
Answer: Option A. -> electric motors
Question 26. What is one way to increase the current in a wire?
  1.    Decrease the number of coils
  2.    Increase the number of coils
  3.    Move the magnet slower
  4.    Take the wire off of the magnet
 Discuss Question
Answer: Option B. -> Increase the number of coils
Question 27. Current sensitivity of a galvanometer can be increased by decreasing :
  1.    Magnetic field B
  2.    number of turns N
  3.    torsional constant K
  4.    Area A
 Discuss Question
Answer: Option C. -> torsional constant K

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