A coil has resistance 30 ohm and inductive reactance 20 ohmn at 50 Hz frequency.

⇦

⇨

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:

1. Light emitted during the de excitation of electron from n=3 to n=2, when incident
2. Two bulbs 40 watt and 60 watt and rated voltage 240 V are connected in series
3. A particle moves along the x-axis such that its co-ordinate (x) varies with time (t)
4. An Electric charge does not have which of the following properties?
5. When a piece of metal is illuminated by a monochromatic light of wavelength λ,

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