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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: - Two resistances 3Ω and 6Ω are connected in parallel
- The electric field at a distance 3R / 2 from the centre of a charged conducting
- When the energy of the incident radiation is increased by 20%,
- The wavelength of light emitted from second orbit to first orbit in a hydrogen atom is
- Dimensions [ML⁻¹T⁻¹] are related with
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
- Two resistances 3Ω and 6Ω are connected in parallel
- The electric field at a distance 3R / 2 from the centre of a charged conducting
- When the energy of the incident radiation is increased by 20%,
- The wavelength of light emitted from second orbit to first orbit in a hydrogen atom is
- Dimensions [ML⁻¹T⁻¹] are related with
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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