An air core coil and an electric bulb are connected in series with an AC source.

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An air core coil and an electric bulb are connected in series with an AC source. If an iron rod is put in the coil, then the intensity of light of the bulb will

Options

(a) remain same
(b) increase
(c) decrease
(d) first decrease then increase

Correct Answer:

decrease

Explanation:

If an iron rod is puts in the coil, then intensity of light of bulb will decrease because the iron rod increase the resistance.

Related Questions:

1. Which of the following does not increase regularly?
2. 1 a.m.u. is equivalent to
3. A heavy small sized sphere is suspended by a string of length l.The sphere rotates
4. In which process, the P-V indicator diagram is a straight line parallel to volume
5. Choose the correct statement

Topics: Alternating Current (96)
Subject: Physics (2479)

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