Question

What do you understand by the term electric resistance? State its practical unit.

Answer 1

Step 1: Electrical resistance:

1. Resistance is described as a conductor's ability to resist the flow of charges through it.
2. The conductor's resistance is expressed numerically as the ratio of the potential difference along its length to the current flowing through it
3. $R=\frac{V}{I}$
4. where $V-$Voltage and $I-$Current

Step 2: The practical unit of electrical resistance:

1. SI unit of resistance is $ohm$.
2. If the current flows the resistance is of f$1A$ and the potential difference across the resistance is of one $V$, the resistance of the conductor is described as $1ohm$.

Thus, the term electrical resistance is the conductor's ability to resist the flow of charges through it. It's practical unit is the $ohm(\Omega )$.