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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 quantities has units but not dimensions
- A beam of light consisting of red, green and blue colours is incident on a right
- A wire of a certain material is stretched slowly by ten percent. Its new resistance
- The intensity at the maximum in a Young’s double slit experiment is I₀.
- In Young’s double slit experiment, a third slit is made in between the double slits.
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 quantities has units but not dimensions
- A beam of light consisting of red, green and blue colours is incident on a right
- A wire of a certain material is stretched slowly by ten percent. Its new resistance
- The intensity at the maximum in a Young’s double slit experiment is I₀.
- In Young’s double slit experiment, a third slit is made in between the double slits.
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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