set 5 MCQ Questions & Answers Detailed Explanation

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The following question based on electric current and magnetism topic of general science mcq

Questions : A compass which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It

(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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Question : 1

Consider the following statements regarding electric fuse wire:

  1. It has low melting point.
  2. It has very high specific resistance.
  3. It is connected in parallel with the electric circuit.
Which of the statements given above is/are correct ?

a) 1 and 2

b) 1 only

c) 1 and 3

d) 2 and 3

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: (c)

Question : 3

Choke coil works on the principle of

a) self induction

b) mutual induction

c) transient current

d) wattless current

Answer: (a)

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