91. For which of the following materials the net magnetic moment should be zero ?
(a) Diamagnetic materials
(b) Ferrimagnetic materials
(c) Antiferromagnetic materials
(d) Antiferrimagnetic materials
Ans: c
92. The attraction capacity of electromagnet will increase if the
(a) core length increases i
(b) core area increases
(c) flux density decreases
(d) flux density increases
Ans: d
93. Which of the following statements is correct ?
(a) The conductivity of ferrites is better than ferromagnetic materials
(b) The conductivity of ferromagnetic materials is better than ferrites
(c) The conductivity of ferrites is very high
(d) The conductivity of ferrites is same as that of ferromagnetic materials
Ans: a
94. Magnetism of a magnet can be destroyed by
(a) heating
(b) hammering
(c) by inductive action of another magnet
(d) by all above methods
Ans: d
96. Temporary magnets are used in
(a) loud-speakers
(b) generators
(c) motors
(d) all of the above
Ans: d
97. Main causes of noisy solenoid are
(a) strong tendency of fan out of lami-nations at the end caused by repul¬sion among magnetic lines of force
(b) uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts
(c) both of above
(d) none of the above
Ans: c
99. Strength of an electromagnet can be increased by
(a) increasing the cross-sectional area
(b) increasing the number of turns
(c) increasing current supply
(d) all above methods
Ans:
100. Core of an electromagnet should have
(a) low coercivity
(6) high susceptibility
(c) both of the above
(d) none of the above
Ans: c
Read More Questions:
Magnetism and Electromagnetism MCQs Part1
Magnetism and Electromagnetism MCQs Part2
Magnetism and Electromagnetism MCQs Part3
Magnetism and Electromagnetism MCQs Part4
Magnetism and Electromagnetism MCQs Part5
Magnetism and Electromagnetism MCQs Part6
Magnetism and Electromagnetism MCQs Part7
Magnetism and Electromagnetism MCQs Part8
Magnetism and Electromagnetism MCQs Part9
Magnetism and Electromagnetism MCQs Part10
(a) Diamagnetic materials
(b) Ferrimagnetic materials
(c) Antiferromagnetic materials
(d) Antiferrimagnetic materials
Ans: c
92. The attraction capacity of electromagnet will increase if the
(a) core length increases i
(b) core area increases
(c) flux density decreases
(d) flux density increases
Ans: d
93. Which of the following statements is correct ?
(a) The conductivity of ferrites is better than ferromagnetic materials
(b) The conductivity of ferromagnetic materials is better than ferrites
(c) The conductivity of ferrites is very high
(d) The conductivity of ferrites is same as that of ferromagnetic materials
Ans: a
94. Magnetism of a magnet can be destroyed by
(a) heating
(b) hammering
(c) by inductive action of another magnet
(d) by all above methods
Ans: d
96. Temporary magnets are used in
(a) loud-speakers
(b) generators
(c) motors
(d) all of the above
Ans: d
97. Main causes of noisy solenoid are
(a) strong tendency of fan out of lami-nations at the end caused by repul¬sion among magnetic lines of force
(b) uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts
(c) both of above
(d) none of the above
Ans: c
99. Strength of an electromagnet can be increased by
(a) increasing the cross-sectional area
(b) increasing the number of turns
(c) increasing current supply
(d) all above methods
Ans:
100. Core of an electromagnet should have
(a) low coercivity
(6) high susceptibility
(c) both of the above
(d) none of the above
Ans: c
Read More Questions:
Magnetism and Electromagnetism MCQs Part1
Magnetism and Electromagnetism MCQs Part2
Magnetism and Electromagnetism MCQs Part3
Magnetism and Electromagnetism MCQs Part4
Magnetism and Electromagnetism MCQs Part5
Magnetism and Electromagnetism MCQs Part6
Magnetism and Electromagnetism MCQs Part7
Magnetism and Electromagnetism MCQs Part8
Magnetism and Electromagnetism MCQs Part9
Magnetism and Electromagnetism MCQs Part10
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