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  4. 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

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Q. 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

AIEEEAIEEE 2005Current Electricity

Solution:

$H_{1}=\frac{V^{2}}{R}t$
$H_{2}=\frac{V^{2}}{R/2}t$
$\therefore \frac{H_{2}}{H_{1}}=2$
$\Rightarrow H_{2}=2H_{1}$