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The unit of thermal conductivity is

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a
Wm-1 K-1
b
JmK-1
c
Jm-1 K-1
d
WmK-1

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detailed solution

Correct option is A

K=QxAT1-T2twhere Q  is the amount of heat flow, x is the thickness of the slab, A is the area of cross-section, and t is the time taken.K=Jmm2 K s=W1 m1 K=Wm-1 K-1

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A body of length 1 m having cross sectional area 0.75 m2 has heat flow through it at the rate of 6000 Joule/sec. Then find the temperature difference if K = 200 Jm-1 K-1


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