When three identical bulbs of 60 W-200 V rating are connected in series to a 200 V

⇦

⇨

When three identical bulbs of 60 W-200 V rating are connected in series to a 200 V supply, the power drawn by them will be

Options

(a) 60 W
(b) 180 W
(c) 10 W
(d) 20 W

Correct Answer:

20 W

Explanation:

In series, Resultant resistance = R₁ + R₂ + R₃ = R + R + R = 3R

Power = V² / R ⇒ 60 = V² / R ⇒ V² = 60 R

Power of combination = P

P = V² / Resistance of combination = 60 / 3 R = 20 W

Related Questions:

1. During an adiabatic process, the cube of the pressure is found to be inversely
2. In vacuum, to travel distance d, light takes time t and in medium to travel distance
3. To observed diffraction, the size of the obstacle
4. The mass of a ⁷₃ Li nucleus is 0.042 u less than the sum of the masses of all its nucleons
5. Time period of oscillation of a magnet is 2 sec. When it is remagnetised

Topics: Magnetic Effects of Current and Magnetism (167)
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