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Units and Measurements

JEE Main 2025 (Online) 23rd January Evening ShiftMatchingMedium📈 Topic in 55% papers+4−1
Ques. 1JEE Main 2025, 23 January (Evening Shift)

Match List - I with List - II Choose the correct answer from the options given below :

  1. (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
  2. (A)-(I), (B)-(IV), (C)-(II), (D)-(III)
  3. (A)-(II), (B)-(I), (C)-(III), (D)-(IV)
  4. (A)-(IV), (B)-(III), (C)-(I), (D)-(II)

Answer

(1) (A)-(III), (B)-(II), (C)-(IV), (D)-(I)

Solution

Reduce each quantity to M, L, T, A with a defining formula.

(A) 0= FI2 MLT-2A-2 (III); (B) B= Fqv MT-2A-1 (II)

(C) m=IA 2A (IV); (D) C= ML2T-2 (I)

A-III, B-II, C-IV, D-I

Answer: (1)

Keep practising — Units and Measurements

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

If B is magnetic field and 0 is permeability of free space, then the dimensions of (B/ 0) is

  1. MT-2A-1
  2. L-1A
  3. ML2T-2A-1
  4. LT-2A-1
Ques. 3JEE Main 2025, 22 January (Morning Shift)

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below.

  1. Both Statement I and Statement II are false
  2. Statement I is true but Statement II is false
  3. Both Statement I and Statement II are true
  4. Statement I is false but Statement II is true
Ques. 4JEE 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 ]
Ques. 5JEE 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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