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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 plumb line is suspended form a ceiling of a car moving with horizontal acceleration
- A potentiometer wire has length 4m resistance 8Ω. The resistance that must be connected
- An electron of mass m and a photon have same energy E. The ratio of de-Broglie
- A wire in the form of a circular loop of one turn, carrying a current, produces
- The horizontal component of earth’s magnetic field at a place is 3×10⁻⁴ T
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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