Question

The dimensional formula for specific resistance (resistivity) is:

• A. $[M L^{-3} T^{-2} A^{-2}]$
• B. $[M L^3 T^{-3} A^{-2}]$
• C. $[M L^3 T^{-3} A^2]$
• D. $[M L^3 T^3 A^2]$

Hint:

Instead of deriving everything from scratch, remember the resistance dimension $[M L^2 T^{-3} A^{-2}]$. Since resistivity multiplies resistance by a unit of length ($[L]$), simply increase the exponent of $L$ by $1$ to get $[M L^3 T^{-3} A^{-2}]$.

Answer 1

The Correct Option is B