set 1 MCQ Questions & Answers Detailed Explanation
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The following question based on electric current and magnetism topic of general science mcq
(a) Neutral terminal
(b) Ground terminal
(c) Live terminal
(d) Any terminal
The correct answers to the above question in:
Answer: (b)
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Question : 1
Whenever, current is changed in a coil, an induced e.m.f. is produced in the same coil. This property of the coil is due to
a) self induction
b) eddy currents
c) mutual induction
d) hysteresis
Answer »Answer: (a)
Question : 2
Potential at any point inside a charged hollow sphere
a) is a constant
b) decreases with distance from centre
c) increases with distance
d) is zero
Answer »Answer: (a)
As, E = $ -{dV}/{dr}$ or, O= $- {dV}/{dr}$
Because electric field inside a charged hollow sphere is zero. or, v = constant
Question : 3
Demagnetisation of magnets can be done by
a) magnetising in the opposite direction
b) rough handling
c) heating
d) All of the above
Answer »Answer: (d)
Question : 4
For electroplating a spoon, it is placed in the voltameter at
a) the position of cathode
b) exactly in the middle of anode and cathode
c) the position of anode
d) anywhere in the electrolyte
Answer »Answer: (a)
In electroplating, the metallic ions are positive, which are deposited on cathode.
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