Question

Pick the false statement from the following :

• A. Resistivity is also called specific resistance.
• B. Reciprocal of resistivity is called conductivity.
• C. Units of both resistivity and resistance are the same.
• D. Low resistivity metals are good conductors.

Answer 1

The Correct Option is C

Correct answer: Units of both resistivity and resistance are the same. 

Explanation:
Let’s examine each statement: 

1. Resistivity is also called specific resistance – True
Resistivity is indeed another name for specific resistance. It is a material property. 

2. Reciprocal of resistivity is called conductivity – True
\[ \text{Conductivity} = \frac{1}{\text{Resistivity}} \] 

3. Units of both resistivity and resistance are the same – False
- Resistance unit: \( \Omega \) (ohm)
- Resistivity unit: \( \Omega \cdot \text{m} \) (ohm-meter)
So, the units are not the same. 

4. Low resistivity metals are good conductors – True
Good conductors like copper and silver have very low resistivity. 

Hence, the false statement is: Units of both resistivity and resistance are the same.