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The unit of thermal conductivity is
Options
(a) Wm⁻¹K⁻¹
(b) JK⁻¹
(c) WmK
(d) JK
Correct Answer:
Wm⁻¹K⁻¹
Explanation:
The heat current related to difference of temperature across the length l of a conductor of area A is
dH/dt = KA / ℓ ∆T (K=Coefficient of thermal conductivity)
.·. K = ℓ dH / A dt ∆T
Unit of K = W m⁻¹ K⁻¹.
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Question Type: Memory
(964)
Difficulty Level: Easy
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Topics: Physical World and Measurement
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A certain metallic surface is illuminated with monochromatic light of wavelength
- The breaking stress of a wire depends upon
- A straight conductor 0.1 m long moves in a uniform magnetic field 0.1 T.
- Light of wavelength λᴀ and λᴃ falls on two identical metal plates A and B respectively.
- A neutron is moving with a velocity u.It collides head on and elastically with an atom
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Physical World and Measurement (103)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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