AIPMT PRELIMS2007Physics-Electricity
AIPMT PRELIMS 2007 Physics Dimensional Analysis MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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
A
ML²T⁻³
B
ML²T⁻³I⁻¹
C
ML²T⁻³I²
D
ML²T⁻³I⁻¹
Correct Answer
Option B
Detailed Explanation
Resistance R has dimensions of voltage/current. Voltage has dimensions of energy/charge, and charge has dimensions of current × time. Thus, R = ML²T⁻³I⁻¹.
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