Question 43
MagnetismOn which of the following is the operation of a moving coil galvanometer based?
- A.Magnetic effect of electric current
- B.Electromagnetic induction
- C.Chemical reaction produced by electricity
- D.Force on a current carrying conductor in a magnetic field
- E.Electrical energy and power.
Show the answer and explanation
Answer: D (Force on a current carrying conductor in a magnetic field)
Explanation
The current in the coil sits in the field of a permanent magnet, so the coil feels a turning force (couple) and rotates against the hairsprings.