Question

State ohm's law. Express it mathematically. Define SI unit of resistance.

Answer 1

Solution:

1. Ohm’s law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant.
2. Mathematically, it is stated as below: $V=IR$
3. Where V is the voltage across the resistor R and I is the current passing through it.
4. Ohm is the SI unit of electrical resistance, transmitting a current of one ampere when a potential difference of 1 volt is applied across it.

Ohm's law has been stated, its mathematical form has been expressed and the SI unit of electrical resistance has been defined.