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An ac having a peak value 1.41 A is used...

An ac having a peak value 1.41 A is used to heat a wire. A dc producing the same heating rate will be approximately

A

1.41 A

B

2.0 A

C

0.705 A

D

1.0 A

Text Solution

Verified by Experts

The correct Answer is:
D
The rms value of the alternating current,
`I_(rms)=I_0/sqrt2=1.41/1.41=1A`
Hence, the dc required to produce the same heating rate =1 A.
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Knowledge Check

  • A vacuum flask contains 0.4 kg liquid paraffin whose temperature can be increased at the rate of 1^(@)C per minute using an immersion heater of power 12.3 W. When a heater of 19.2 W is used to heat 0.5 kg of liquid paraffin, in the same flask, the rate of rise temperature is 1.2^(@)C per minute. What is specific heat of the paraffin?

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    D
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