| ⇦ | 
| ⇨ |
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 light whose frequency is equal to 6.0 x 10¹⁴ Hz is incident on a metal
- The young’s modulus of steel is twice that of brass. Two wires of same length
- What is the nature of Gaussian surface involved in Gauss’s law of electrostatics?
- If X=3YZ², find dimensions of Y if X and Z are the dimensions of capacity
- A parallel plate air capacitor of capacitance C is connected to a cell of emf
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A light whose frequency is equal to 6.0 x 10¹⁴ Hz is incident on a metal
- The young’s modulus of steel is twice that of brass. Two wires of same length
- What is the nature of Gaussian surface involved in Gauss’s law of electrostatics?
- If X=3YZ², find dimensions of Y if X and Z are the dimensions of capacity
- A parallel plate air capacitor of capacitance C is connected to a cell of emf
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply