Question

A current of $200mA$ flows through resistor of $4k\Omega$. What is the $PD$ across the resistor?

Answer 1

Given'

Current flowing through conductor is $=200mA$ or $200\times {10}^{-3}$

Resistance (r) $=4k\Omega$ or $4000\Omega$

Potential difference =?

We know,

Ohm's law:

$V=IR$

$V=200\times {10}^{-3}\times 4000$

$V=800volts$

The potential difference is $=800volts$