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When three identical bulbs of 60 W-200 V rating are connected in series to a 200 V supply, the power drawn by them will be
Options
(a) 60 W
(b) 180 W
(c) 10 W
(d) 20 W
Correct Answer:
20 W
Explanation:
In series, Resultant resistance = R₁ + R₂ + R₃ = R + R + R = 3R
Power = V² / R ⇒ 60 = V² / R ⇒ V² = 60 R
Power of combination = P
P = V² / Resistance of combination = 60 / 3 R = 20 W
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Topics: Magnetic Effects of Current and Magnetism
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- To what temperature should the hydrogen at room temperature (27°C) be heated at constant
- Height of geostationary satellite is
- If two slits in Young’s experiment are 0.4 mm apart and fringe width on a screen
- Given A=4i+6j and B=2i+3j. Which of the following is correct?
- If a given volume of water in a 220V heater is boiled in 5 min, then same volume
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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