MCQ on Moving Coil Galvanometer: Previous trends reveal that NEET/JEE aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations.

In this post we are providing you MCQ on Moving Coil Galvanometer, which will be beneficial for you in upcoming NEET, AIIMS, JEE, WBJEE, Medical and Engineering Exams.

MCQ on Moving Coil Galvanometer

Q1. In ballistic galvanometer, the frame on which the coil is wound is non-metallic. It is
a) To avoid the production of induced e.m.f
b) To avoid the production of eddy currents
c) To increase the production of eddy currents
d) To increase the production of induced e.m.f

Q2. A current-carrying rectangular coil placed in a uniform magnetic field. In which orientation will the coil rotate?
a) In any orientation
b) The magnetic field is parallel to the plane of the coil
c) The magnetic field is at 450 with the plane of the coil
d) The magnetic field is perpendicular to the plane

Q3. The reason the coil is bound over the metallic frame in moving coil galvanometer is
a) The metallic frame helps in oscillation
b) The metallic frame helps in making steady deflection without any oscillation
c) The metallic frame increases the magnetic field
d) None of the above

Q4. The pole pieces of the magnet used in a pivoted coil galvanometer are
a) Plane surfaces of a horse-shoe magnet
b) Cylindrical surfaces of a bar magnet
c) Plane surfaces of a bar magnet
d) Cylindrical surfaces of a horse-shoe magnet

Q5. What is the shape of a magnet in moving coil galvanometer to make the radial magnetic field?
a) Convex cylindrical magnet
b) Horse-shoe magnet
c) Concave cylindrical magnet
d) None

Q6. A moving coil galvanometer carries a current I and the magnetic field B is radial. The coil has N number of turns and an effective area A. The torque acting on the coil of a moving coil galvanometer is given by
a) NA²B²I
b) NABI²
c) NABI
d) N²ABI

Q7. Phospher- bronze wire is used in suspension because it has
a) A large couple per unit twist
b) A small couple per unit twist
c) Low conductivity
d) High Sensitivity

Q8. The deflection θ is related to the electric current I in a galvanometer by the relation
a) I ∝ θ
b) I ∝ tan θ
c)  I ∝ sin θ
d) I ∝ cos θ

Q9. The deflection in moving coil galvanometer is
a) Inversely proportional to the area of the coil
b) Directly proportional to the torsional constant
c) inversely proportional to the current flowing
d) Directly proportional to the number of turns of the coil

Q10. The sensitivity of a moving coil galvanometer can be increased by decreasing
a) The number of turns in the coil
b) The area of the coil
c) The magnetic field
d) The couple per unit twist of the suspension

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By Team Learning Mantras