| ⇦ | 
| ⇨ |
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: - After 300 days, the activity of a radioactive sample is 5000 dps
- An astronomical telescope arranged for normal adjustment has a magnification of 6.
- If a wire is stretched to four times its length, then the specific resistance
- What is the energy released by fission of 1 g of U²³⁵?
- The value of workdone for rotating a magnet of magnetic moment M by an angle θ in external
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- After 300 days, the activity of a radioactive sample is 5000 dps
- An astronomical telescope arranged for normal adjustment has a magnification of 6.
- If a wire is stretched to four times its length, then the specific resistance
- What is the energy released by fission of 1 g of U²³⁵?
- The value of workdone for rotating a magnet of magnetic moment M by an angle θ in external
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