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Units and Measurements

AIPMT 2004MCQEasy📈 Topic in 38% papers+4−1
Ques. 1AIPMT 2004

The dimensions of universal gravitational constant are

  1. [ M-1L3T-2]
  2. [ ML2T-1]
  3. [ M-2L3T-2]
  4. [ M-2L2T-1]

Answer

(1) [ M-1L3T-2]

Solution

From Newton's law of gravitation, F = G m1 m2r2

G = F r2m1 m2

[G] = [ MLT-2][L2][M2]

= [ M-1L3T-2]

Answer: (1)

Keep practising — Units and Measurements

Ques. 2AIPMT 2001

The dimensions of Planck's constant are equal to those of

  1. energy
  2. momentum
  3. angular momentum
  4. power
Ques. 3AIPMT 2000

Which pair does not have equal dimensions?

  1. Energy and torque
  2. Force and impulse
  3. Angular momentum and Planck constant
  4. Elastic modulus and pressure

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