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  • Can someone explain A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be

A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be

  • Option 1)

    one fourth

  • Option 2)

    halved

  • Option 3)

    doubled

  • Option 4)

    four times

 

Answers (1)

best_answer

As we learnt in

if R=r -

P_{max}=\frac{E^{2}}{4r}

- wherein

Power delivered will be maximum

 

full coil = R

Each half piece = \frac{R}{2}

\therefore \frac{H_{2}}{H_{1}} = \frac{v^{2}t}{\frac{R}{2}}\times \frac{R}{v^{2}t}= \frac{2}{1}

\therefore H_{2}= 2H_{1} 

 

 


Option 1)

one fourth

This option is incorrect.

Option 2)

halved

This option is incorrect.

Option 3)

doubled

This option is correct.

Option 4)

four times

This option is incorrect.

Posted by

divya.saini

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