Q96 / 180 · AIIMS 2019 (25 May) · Physics

The only mechanical quantity which has negative dimension of mass is

  • A
    angular momentum
  • B
    torque
  • C
    coefficient of thermal conductivity
  • Correct answer
    D
    gravitational constant

Solution

$\begin{aligned} & \text { } F=\frac{G m_1 m_2}{r^2} \text { or } G=\frac{F r^2}{m_1 m_2} \\ & {[G]=\left[\frac{\mathrm{MLT}^{-2} \mathrm{~L}^2}{\mathrm{M}^2}\right] \text { or }[G]=\left[\mathrm{M}^{-1} \mathrm{~L}^3 \mathrm{~T}^{-2}\right]}\end{aligned}$

Hence, the correct answer is option: 'D'.

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