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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 wire of length 1 m is moving at a speed of 2 ms⁻¹ perpendicular to its length
- Zenor breakdown in a semiconductor diode occurs when
- A current of 5 A is flowing at 220 V in the primary coil of a transformer. If the voltage
- For a diatomic gas charge in internal energy for unit charge in temperature for
- A bottle full of water in a space ship at 30⁰C is carried on the moon.
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 wire of length 1 m is moving at a speed of 2 ms⁻¹ perpendicular to its length
- Zenor breakdown in a semiconductor diode occurs when
- A current of 5 A is flowing at 220 V in the primary coil of a transformer. If the voltage
- For a diatomic gas charge in internal energy for unit charge in temperature for
- A bottle full of water in a space ship at 30⁰C is carried on the moon.
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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