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Units and Measurements

JEE Main 2025 (Online) 22nd January Evening ShiftMCQEasy📈 Topic in 55% papers+4−1
Ques. 1JEE Main 2025, 22 January (Evening Shift)

Which one of the following is the correct dimensional formula for the capacitance in F ? M, L, T and C stand for unit of mass, length, time and charge respectively.

  1. [F]= [ C M-1L-2T2 ]
  2. [F]= [ C2M-2L2T2 ]
  3. [F]= [ C2M-1L-2T2 ]
  4. [F]= [ C M-2L-2T-2 ]

Answer

(3) [F]= [ C2M-1L-2T2 ]

Solution

C= qV and V= Wq [ F]= q2W

= C2 M L2T-2= [ C2M-1L-2T2 ]

Answer: (3)

Keep practising — Units and Measurements

Ques. 2JEE Main 2025, 22 January (Evening Shift)

The maximum percentage error in the measurement of density of a wire is [Given, mass of wire =(0.60 0.003) g radius of wire =(0.50 0.01) cm length of wire =(10.00 0.05) cm]

  1. 7
  2. 8
  3. 5
  4. 4

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