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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
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The radius of curvature of the convex face of a plano-convex lens is 12 cm
- A man goes 10 m towards north, then 20m towards east, the displacement is
- When a piece of metal is illuminated by a monochromatic light of wavelength λ,
- A glass flask weighing 390 g having internal volume 500 cc just floats
- In the half wave rectifier circuit operating from 50 Hz mains frequency,
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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