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If two electric bulbs have 40 W and 60 W ratings at 220 V, then the ratio of their resistances will be
Options
(a) (3:2)
(b) (2:3)
(c) (3:4)
(d) (4:3)
Correct Answer:
(3:2)
Explanation:
P = V² / R
⇒ R₁ / R₂ = P₂ / P₁ = 60 / 40 = 3 / 2 = 3 : 2
Related Questions: - Which of the following is not a transverse wave?
- A ship of mass 3 x 10⁷ kg initially at rest is pulled by a force of 5 x 10⁴ N through
- The threshold frequency for a certain photosensitive metal is ν₀. When it is illuminated
- Under the action of a force F=cx, the position of a body changes from 0 to x.The work done
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Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following is not a transverse wave?
- A ship of mass 3 x 10⁷ kg initially at rest is pulled by a force of 5 x 10⁴ N through
- The threshold frequency for a certain photosensitive metal is ν₀. When it is illuminated
- Under the action of a force F=cx, the position of a body changes from 0 to x.The work done
- A body of mass 120 kg and density 600 kg/m³ floats in water.
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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