Question

19. The instrument that use to defect
electric current in the circuit is known
as
(a) electric motor
(b) A.C generator
(c) galvanometer
(d) none of the above
→ Answer/Explanation

Answer 1

Answer:

The correct answer is option C

A galvanometer is a device that helps to detect changes in current.

Explanation:

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Answer 2

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☛ The instrument that is used to defect electric current in the circuit is known as galvanometer.

So, option (c) galvanometer is correct

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☛ It is connected in series with the circuit.

☛ when no current is flowing through a galvanometer,it's pointer is at the zero mark in the centre of semicircular scale.

☛ when an electric current passes through the galvanometer,then it's pointer deflects or move either to the left side of zero mark or to the right side of the zero mark, depending on the direction of current.

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☛ Electormagnetic induction :-The production of electricity from magnetism is called Electormagnetic induction.

☛ Direct current (DC) :-If the current flows in only one direction,it is called direct current.

☛ Alternating current (AC) :-If the current reverses direction after equal intervals of time,it is called alternating current.