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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: - Which of the following is not a transverse wave?
- A cyclist is riding with a spped of 27 km/h.As he approaches a circular turn
- A Galilean telescope has an objective of focal length 100 cm and magnifying power 50
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following is not a transverse wave?
- A cyclist is riding with a spped of 27 km/h.As he approaches a circular turn
- A Galilean telescope has an objective of focal length 100 cm and magnifying power 50
- Consider 3rd orbit of He⁺(helium), using non-relativistic approach, the speed
- The magnetic field due to a current carrying circular loop of radius 3 cm at a point
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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