MHT-CET

Units and Dimensions question bank (Physics)

Practice 35 free MHT-CET Physics - Units and Dimensions questions with answers and step-by-step solutions.

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Q1.

Which one of the following combination of constants has dimensions of time? $[\mathrm{G}=$ constant of gravitation, $\mathrm{h}=$ Planck's constant, $\mathrm{c}=$ velocity of light $]$

(A)

$\left[\frac{G h}{c^{5}}\right]^{\frac{1}{2}}$

(B)

$\left[\frac{G h}{c}\right]^{\frac{1}{2}}$

(C)

$\left[\frac{G h}{c^{4}}\right]^{\frac{1}{2}}$

(D)

$\left[\frac{G h}{c^{3}}\right]^{\frac{1}{2}}$

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Q2.

The force ‘F’ acting on a body of density ‘d’ are related by the reflection $F = \frac{y}{\sqrt{d}}$ . The dimensions of ‘y’ are

(A)

[L^{- \frac{1}{2}} M^{\frac{3}{2}} T^{- 2}]

(B)

[L^{- 1} M^{\frac{1}{2}} T^{- 2}]

(C)

[L^{- 1} M^{\frac{3}{2}} T^{- 2}]

(D)

[L -^{\frac{1}{2}} M^{\frac{1}{2}} T^{- 2}]

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