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A 10 kW drilling machine is used to dril...

A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass 8 kg. Find the rise in temperature of the block in `2.5` minutes, assuming `50%` power is used up in heating the machine itself or lost to the surropundings.
(Specific heat of aluminium `= 0.91 J g^(-1).^(@)C^(-1)`)

A

`20^(@) C`

B

`25^(@) C`

C

`35^(@) C`

D

`50^(@) C`

Text Solution

Verified by Experts

The correct Answer is:
B
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