Consider an electrical conductor connected ac | vedclass

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

Question

(D) When a charge $\Delta q$ moves through a potential difference $V$,the change in its electric potential energy is given by $\Delta U = \Delta q \cd

Vedclass · Accepted Answer

$II$ and $III$

Vedclass · Answer

(D) When a charge $\Delta q$ moves through a potential difference $V$,the change in its electric potential energy is given by $\Delta U = \Delta q \cdot V$. Since $I = \frac{\Delta q}{\Delta t}$,we have $\Delta q = I \Delta t$. Thus,the potential energy decreases by $I V \Delta t$.In a steady current,the drift velocity of the charge carriers remains constant,meaning the kinetic energy of the charge does not increase significantly. Instead,the lost potential energy is dissipated as heat due to collisions with the lattice ions of the conductor.Therefore,the thermal energy of the conductor increases by $I V \Delta t$.Statements $II$ and $III$ are correct.

Similar Questions

Which of the following statements is false?

$A$ current of $2\, mA$ was passed through an unknown resistor which dissipated a power of $4.4\, W$. The dissipated power when an ideal power supply of $11\, V$ is connected across it is:

$A$ rise of temperature of $4\,^oC$ is observed in a conductor by passing a current. If the current is tripled,the rise in temperature will be .............. $^oC$.

An electric fan and a heater are marked as $100 \ W, 220 \ V$ and $1000 \ W, 220 \ V$ respectively. The resistance of the heater is

An electric bulb marked as $50 W - 200 V$ is connected across a $100 V$ supply. The present power of the bulb is (in $W$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module