Question

Identify the best definition of electrical resistance.

• A. It is a measure of how much an object impedes an electric current
  
• B. It is caused by free electrons in the material
• C. It is a measure of a material's resistivity
• D. It is another name for resistivity
• E. It increases with increasing current

Answer 1

The correct option is A It is a measure of how much an object impedes an electric current

Electric resistance is defined as the difficulty offered by a material to pass an electric current through that material i.e measure of how much a material impedes an electric current.

It is measured in ohms $\left(\Omega \right)$.

Resistance $R=\frac{V}{I}$ $⟹R\propto \frac{1}{I}$ (V =constant)

Thus resistance decreases with increase in current.

Hence option A is correct.