| ⇦ | 
| ⇨ |
A 220 volt and 1000 watt bulb is connected across a 110 volt mains supply. The power consumed will be
Options
(a) 1000 W
(b) 750 W
(c) 500 W
(d) 250 W
Correct Answer:
250 W
Explanation:
P = V² / R. A bulb has a fixed resistance.
⇒ P₁ / P₂ = V₁² / V₂²
⇒ 10000 / P₂ = (220/110)² = 4
⇒ 4P₂ = 1000 ⇒ P₂ = 250 W
Related Questions: - A boat of mass 40 kg is at rest.A dog of mass 4 kg moves in the boat
- If the electric field lines is flowing along axis of a cylinder, then the flux
- Four identical cells of emf Ԑ and internal resistance r are to be connected in series.
- When aluminium is added as an impurity to silicon, the resulting material is
- A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A boat of mass 40 kg is at rest.A dog of mass 4 kg moves in the boat
- If the electric field lines is flowing along axis of a cylinder, then the flux
- Four identical cells of emf Ԑ and internal resistance r are to be connected in series.
- When aluminium is added as an impurity to silicon, the resulting material is
- A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
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
Leave a Reply