CBSE Class 12 Magnetism and Matter Multiple Choice Questions with Answers. MCQ Questions Class 12 Magnetism and Matter with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Magnetism and Matter MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Magnetism and Matter with Answers - Set - 1
Question 1:
The lines of force due to earth’s horizontal magnetic field are:
(a) Curved lines
(b) elliptical
(c) Parallel and straight
(d) concentric circles.
Correct Answer – (A)
Question 2 :
The magnetic fields strength at a distance d from a short bar magnet in longitudinal and transverse positions are in the ratio.
(a) 2 : 1
(b) 1 : 2
(c) 1 : 1
(d) 3 : 2
Correct Answer – (A)
Question 3 :
A steel wire of length l has a magnetic moment M. It is the bent into a semi circular arc. The new magnetic moment is:
(a) M/l
(b) M
(c) 2/π
(d) M x l
Correct Answer – (C)
Question 4 :
Two identical magnets each of dipole moment M and length 21 are perpendicular to each other as shown in figure here. The dipole moment of the combination is
(a) √2 M
(b) 2M
(c) M/√2
(d) M/2
Correct Answer – (A)
Question 5 :
The angle of dip at a place where the horizontal component of earth’s magnetic field equals the vertical component is:
(a) 45°
(b) 0°
(c) 90°
(d) 30°
Correct Answer – (A)
MCQ Questions Class 12 Magnetism and Matter with Answers
Question 6 :
A long solenoid has 800 turns per metre length of solenoid. A current of 1.6 A flows through it. The magnetic induction at the end of the solenoid on its axis is:
(a) 32 × 10-4 T
(b) 16 × 10-4 T
(c) 4 × 10-4 T
(d) 8 × 10-4 T
Correct Answer – (D)
Question 7 :
A magnetic needle lying parallel to a magnetic field requires W units of work to turn in through 60°. The torque needed to maintain the needle in this position will be:
(a) W/√3
(b)√3W
(c) (2/√3)W
(d) (√3/2)W
Correct Answer – (B)
Question 8 :
The Hysteresis cycle for the material of permanent magnet should be:
(a) long and thin
(b) short and thin
(c) short and wide
(d) long and wide
Correct Answer – (D)
Question 9 :
Isoclinic lines are the lines joining places of:
(a) equal dip
(b) equal declination
(c) 0° dip and 90° declination
(d) equal dip and declination both
Correct Answer – (A)
Question 10 :
The unit of pole strength is:
(a) Am-1
(b) Am
(c) Am-2
(d) Am²
Correct Answer – (B)
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