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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
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A solid sphere, disc and solid cylinder all of the same mass and made up of same material
- A particle is kept at rest at the top of a sphere of diameter 42m.When disturbed slightly
- The potential energy of a weightless spring compressed by a distance D is proportional
- Two stones of masses m and 2m are whirled in horizontal circles, the heavier one
- A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω
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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