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The figure given below shows the cooling...

The figure given below shows the cooling curve of pure wax material after heating. It cools from A to B and solidifies along BD . If L and C are respective values of latent heat and the specific heat of the liquid wax, the ratio L / C is

A

40

B

80

C

100

D

20

Text Solution

Verified by Experts

The correct Answer is:
D
Let the quantity of heat supplied per minute be Q, then quantity of heat supplied in 2min = mc(90-80)
In 4min, heat supplied = 2mc(90-80)
`therefore` 2mc(90-80) = mL
`rArr` L/c = 20
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