Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Units and Measurements

Question:
Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I, would be
Options:
$[ML^2T^{-2}]$
$[ML^2T^{-1}I^{-1}]$
$[ML^2T^{-3}I^{-2}]$
$[ML^2T^{-3}I^{-1}]$
Correct Answer:
$[ML^2T^{-3}I^{-2}]$
Explanation:
R = $\frac{H}{I^2t}$ = $\frac{[ML^2T^{-2}]}{[I^2T]}$ = $[ML^2T^{-3}I^{-2}]$