CBSE Class 12 Moving Charges and Magnetism Multiple Choice Questions with Answers. MCQ Questions Class 12 Moving Charges and Magnetism with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Moving Charges and Magnetism MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Moving Charges and Magnetism with Answers - Set - 3
Question 1:
A current carrying power line carries current from west to east. Then the direction of the magnetic field 2 m above it is :
(a) west to east
(b) south to north
(c) north to south
(d) None of these
Correct Answer – (A)
Question 2 :
When we double the radius of a coil keeping the current through it unchanged, what happens to the magnetic field directed along its axis at far off points?
(a) halved
(b) doubled
(c) quadrupled
(d) remains unchanged
Correct Answer – (D)
Question 3 :
Circular loop of radius 0.0157 m carries a current 2 A. The magnetic field at the centre of the loop is :
(a) 1.57 × 10-3Wb/m²
(b) 8.0 × 10-5 Wb/m²
(c) 2.0 × 10-3 Wb/m²
(d) 3.l4 × 10-1 Wb/m²
Correct Answer – (B)
Question 4 :
What is the angle of dip at the magnetic poles ?
(a) 30°
(b) 0°
(c) 45°
(d) None of these
Correct Answer – (D)
Question 5 :
The permeability of a paramagnetic substance is:
(a) very large
(b) small but more than unity
(c) less than unity
(d) negative
Correct Answer – (B)
MCQ Questions Class 12 Moving Charges and Magnetism with Answers
Question 6 :
The strength of the magnetic field around an infinite current carrying conductor is :
(a) same everywhere
(b) inversely proportional to the distance
(c) directly proportional to the distance
(d) None of these
Correct Answer – (B)
Question 7 :
What happens to the magnetic field at the centre of a circular current carrying coil if we double the radius of the coil keeping the current unchanged?
(a) halved
(b) doubled
(c) quadrupled
(d) remains unchanged
Correct Answer – (A)
Question 8 :
A charged particle of mass m and charge q travels on a circular path of radius r i.e., perpendicular to the magnetic field B. The time taken by particle to complete on revolution is :
(a) 2πqB/m
(b) 2πq/Bm
(c) 2πmq/B
(d) 2πq2B/m
Correct Answer – (B)
Question 9 :
Which of the following shows that the earth behaves as a magnet?
(a) Repulsion between like poles .
(b) Attraction between unlike poles
(c) Null points in the magnetic field of a bar magnet
(d) No existence of isolated magnetic poles
Correct Answer – (C)
Question 10 :
The sensitivity of a tangent galvanometer can be increased by increasing:
(a) the radius of the coil
(b) the external magnetic field
(c) the number of turns of the coil
(d) all the above
Correct Answer – (B)
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