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A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source, of 200 volt, 100 Hz, is connected across the coil, the current in the coil will be
Options
(a) 4.0 A
(b) 8.0 A
(c) 20 / √13 A
(d) 2.0 A
Correct Answer:
4.0 A
Explanation:
If ? = 50 x 2π then ?L = 20Ω
If ?’ = 100 x 2π then ?’L = 40Ω
I = 200 / Z = 200 / √ R² + (?’L)²
= 200 / √ (30)² + (40)²
I = 4 A
Related Questions: - A galvanometer has a coil of resistance 100 ohm and gives a full-scale deflection
- If A=4i+4j+4k and b=3i+j+4k, then angle between vectors A and B is
- A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A galvanometer has a coil of resistance 100 ohm and gives a full-scale deflection
- If A=4i+4j+4k and b=3i+j+4k, then angle between vectors A and B is
- A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
- If a small sphere is let fall vertically in a large quantity of still liquid of density
- The electric current in AC circuit is given by the relation i-3 sinωt+4 cos ωt.
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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