Question

If the value of resistance is $10.845\Omega$ and the value current is $3.23$ A, the potential difference is $35.02935V$. Find its value in significant number.

Answer 1

The product of two no.'s can be precise as the least precise no. So the significant digits after the decimal are two.

$\therefore$ In $V=IR$

$I=3.23A$ and $R=10.845\Omega \Rightarrow V=35.03V$

As we can report up to only two significant figures after the decimal so the value of $V$ is rounded off.