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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.
Related Questions: - A body takes 5 minute for cooling from 50⁰C to 40⁰C. Its temperature
- Two racing cars of masses m₁ and m₂ are moving in circles of radii
- A rectangular copper coil is placed in a uniform magnetic field of induction 40 mT
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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
- A body takes 5 minute for cooling from 50⁰C to 40⁰C. Its temperature
- Two racing cars of masses m₁ and m₂ are moving in circles of radii
- A rectangular copper coil is placed in a uniform magnetic field of induction 40 mT
- An electron moving in a uniform magnetic field of induction of intensity B,
- A ball rolls without slipping. The raidus of gyration of the ball about an axis
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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