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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
- Three capacitors each of capacity 4 μF are to be connected in such a way that the effective
- Six molecules have speeds 2 units, 5 units, 3 units, 6 units, 3 units and 5 units
- Point masses m₁ and m₂ are placed at the opposite ends of a rigid rod of length L,
- A particle with total energy E is moving in a potential energy region U(x)
- The electric potential V at any point (x,y,z) all in meters in space is given by
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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