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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
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In an LCR series A.C circuit, the voltage across each of the components, L, C and R is 50V
- Two coherent sources of intensity ratio α interfere. In interference pattern,
- A p-n-p transistor is used in common emitter mode in an amplifier circuit.
- If 75% of the radioactive reaction is completed in 2 hrs, what would be
- The time by a photoelectron to come out after the photon strikes is approximately
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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