Heat is produced at a rate given by H in a re | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The rate of heat production (power) in a resistor is given by the formula $H = \frac{V^2}{R}$.In the first case, the power is $H = \frac{V^2}{R}$.

Vedclass · Accepted Answer

$H / 18$

Vedclass · Answer

(A) The rate of heat production (power) in a resistor is given by the formula $H = \frac{V^2}{R}$.In the first case, the power is $H = \frac{V^2}{R}$.In the second case, the new voltage is $V' = \frac{V}{3}$ and the new resistance is $R' = 2R$.The new rate of heat production $H'$ is given by:$H' = \frac{(V')^2}{R'} = \frac{(\frac{V}{3})^2}{2R} = \frac{\frac{V^2}{9}}{2R} = \frac{V^2}{18R}$.Since $H = \frac{V^2}{R}$, we can substitute this into the equation:$H' = \frac{H}{18}$.

Heat is produced at a rate given by $H$ in a resistor when it is connected across a supply of voltage $V$. If now the resistance of the resistor is doubled and the supply voltage is made $V / 3$, then the rate of production of heat in the resistor will be

Similar Questions

$A$ $220\, V$,$1000\, W$ bulb is connected across a $110\, V$ mains supply. The power consumed will be ............ $W$.

What is the value of $1 \, kWh$ in Joules?

In the figure shown,the power generated in $y$ is maximum when $y = 5\,\Omega$. Then $R$ is

The heat developed in an electric wire of resistance $R$ by a current $I$ for a time $t$ is

$A$ constant voltage is applied between two ends of a metallic wire. If the length is halved and the radius of the wire is doubled,the rate of heat developed in the wire will be

Vedclass Test Series

Exam Paper Generator

Online Exam Module