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Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are K₁ and K₂ and cross sectional areas A₁ and A₂, respectively. If the rate of heat conduction in rod 1 is four times that in rod 2, then
Options
(a) K₁A₁ = K₂A₂
(b) K₁A₁ = 4K₂A₂
(c) K₁A₁ = 2K₂A₂
(d) 4K₁A₁ = K₂A₂
Correct Answer:
K₁A₁ = 4K₂A₂
Explanation:
Q = 4Q (Given)
K₁A₁ ∆t / L= 4 K₂A₂ ∆t / L
K₁A₁ = 4K₂A₂
Related Questions: - The de-Broglie wavelength of a proton(charge = 1.6 x 10⁻¹⁹ C, Mass = 1.6 x 10⁻²⁷ kg)
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Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The de-Broglie wavelength of a proton(charge = 1.6 x 10⁻¹⁹ C, Mass = 1.6 x 10⁻²⁷ kg)
- A coil has resistance 30 ohm and inductive reactance 20 ohmn at 50 Hz frequency.
- A condenser has a capacity 2 μF and is charged to a voltage of 50 V. The energy
- If sound wave travel from air to water, which of the following remains unchanged?
- If the length of a stretched string is shortened by 4% and the tension is increased
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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