A highly rigid cubical block A of small mass M and side L is fixed rigidly onto another cubical block B of the same dimensions and of low modulus of rigidity η such that the lower face of A completely covers the upper face of B. The lower face of B is rigidly held on a horizontal surface. A small force F is applied perpendicular to one of the side faces of A. After the force is withdrawn block A executes small oscillations. The time period of which is given by 

(1) 2πMηL

(2) 2πLMη

(3) 2πMLη

(4) 2πMηL

Subtopic:  Dimensions |
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The pair(s) of physical quantities that do not have the same dimensions, is (are) 

(1) Reynolds number and coefficient of friction

(2) Latent heat and gravitational potential

(3) Curie and frequency of a light wave

(4) Planck's constant and torque

Subtopic:  Dimensions |
 67%
From NCERT
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If the constant of gravitation (G), Planck's constant (h) and the velocity of light (c) be chosen as fundamental units. The dimension of the radius of gyration is 

(1) h1/2c3/2G1/2

(2) h1/2c3/2G1/2

(3) h1/2c3/2G1/2

(4) h1/2c3/2G1/2

Subtopic:  Dimensions |
 64%
From NCERT
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X = 3YZ2 find dimension of Y in (MKSA) system, if X and Z are the dimension of capacity and magnetic field respectively

(1) M3L2T4A1

(2) ML–2

(3) M3L2T4A4

(4) M3L2T8A4

Subtopic:  Dimensions |
From NCERT
PMT - 2003
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In the relation P=αβeαZkθ, P is pressure, Z is the distance, k is the Boltzmann constant and θ is the temperature. The dimensional formula of β will be:

(1) [M0L2T0]

(2) [M1L2T1]

(3) [M1L0T1]

(4) [M0L2T1]

Subtopic:  Dimensions |
 58%
From NCERT
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The frequency of vibration of string is given by ν=p2lFm1/2. Here p is number of segments in the string and l is the length. The dimensional formula for m will be

(1) [M0LT1]

(2) [ML0T1]

(3) [ML1T0]

(4) [M0L0T0]

Subtopic:  Dimensions |
 69%
From NCERT
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Column I Column II
 (i) Curie  (A) MLT–2
 (ii) Light year  (B) M
 (iii) Dielectric strength  (C) Dimensionless
 (iv) Atomic weight  (D) T
 (v) Decibel  (E) ML2T–2
   (F) MT–3
   (G) T–1
   (H) L
   (I) MLT–3I–1
   (J) LT–1

Choose the correct match 

(1) (i) G, (ii) H, (iii) I, (iv) B, (v) C

(2) (i) D, (ii) H, (iii) I, (iv) B, (v) G

(3) (i) G, (ii) H, (iii) I, (iv) B, (v) G

(4) None of the above

Subtopic:  Dimensions |
 50%
From NCERT
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A wire has a mass of 0.3 ± 0.003 g, a radius of 0.5 ± 0.005 mm, and a length of 0.6 ± 0.006 cm. The maximum percentage error in the measurement of its density will be

1. 1

2. 2

3. 3

4. 4

Subtopic:  Errors |
 62%
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If \(97.52\) is divided by \(2.54\), the correct result in terms of significant figures is:

1. \( 38.4 \) 2. \(38.3937 \)
3. \( 38.394 \) 4. \(38.39\)
Subtopic:  Significant Figures |
 73%
From NCERT
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Assertion :Light year’ and ‘Wavelength’ both measure distance.

Reason : Both have dimensions of time.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Dimensions |
 76%
From NCERT
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