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
AIEEE 2005, Easy
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$H = \frac{{{V^2}t}}{R}$ $ \Rightarrow $ $\frac{{{H_{Half}}}}{{{H_{Full}}}} = \left( {\frac{{{R_{Full}}}}{{{R_{Half}}}}} \right) = \frac{R}{{R/2}} = 2$
$ \Rightarrow $ ${H_{Half}} = 2 \times {H_{Full}}$.
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