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  4. A resistor dissipates 192 J of energy in 1 s when a current of 4 A is passed through it. Now, when the current is doubled, the amount of thermal energy dissipated in 5 s in J .

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Q. A resistor dissipates $192\, J$ of energy in $1 s$ when a current of $4 A$ is passed through it. Now, when the current is doubled, the amount of thermal energy dissipated in $5 s$ in _____ $J .$

JEE MainJEE Main 2021Current Electricity

Solution:

$E = i ^{2} Rt$
$192=16( R )(1)$
$R =12 \Omega$
$E ^{1}=(8)^{2}(12)(5)$
$=3840\, J$