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The following question based on electric current and magnetism topic of general science mcq
(a) will stay in any position
(b) will stay in north-south direction only
(c) will stay in east-west direction only
(d) None of these
The correct answers to the above question in:
Answer: (a)
At geomagnetic poles, there is no horizontal component of earth field and so compass needle may stay at any position.
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Read more physics gk Based General Science Questions and Answers
Question : 1
Consider the following statements regarding electric fuse wire:
- It has low melting point.
- It has very high specific resistance.
- It is connected in parallel with the electric circuit.
a) 1 and 2
b) 1 only
c) 1 and 3
d) 2 and 3
Answer »Answer: (a)
An electric fuse wire should have low melting point and very high specific heat. Also it is connected in series with the electric circuit.
Question : 2
If a bulb of 100 watt burns for 10 hours, the expenditure of electricity will be
a) 10 units
b) 0-1 unit
c) 1 unit
d) 100 units
Answer »Answer: (c)
Question : 3
Choke coil works on the principle of
a) self induction
b) mutual induction
c) transient current
d) wattless current
Answer »Answer: (a)
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