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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: - The magnetic flux linked with a coil at any instant t is given by ?, find emf
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- A layer of colourless oil spreads on water surface. White light is incident on it
- Three resistances P,Q,R each of 2Ω and an unknown resistances S form the four arms
- A parallel plate air capacitor is charged to a potential difference of V volts.
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The magnetic flux linked with a coil at any instant t is given by ?, find emf
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- A layer of colourless oil spreads on water surface. White light is incident on it
- Three resistances P,Q,R each of 2Ω and an unknown resistances S form the four arms
- A parallel plate air capacitor is charged to a potential difference of V volts.
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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