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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 mass m moving horizontally (along the x-axis) with velocity v collides and sticks
- Two coherent sources of different intensities send waves which interfere.
- The magnetic field in a certain region of space is given by B =8.35×10⁻² Î T.
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A mass m moving horizontally (along the x-axis) with velocity v collides and sticks
- Two coherent sources of different intensities send waves which interfere.
- The magnetic field in a certain region of space is given by B =8.35×10⁻² Î T.
- A beam of light of wavelength 600 nm from a distant source falls
- By sucking through a straw, a student can reduce the pressure of his lungs
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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