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 $\eta$ 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 A small force F is applied perpendicular to one of the side faces of A. After the force is withdrawn block A executes small oscillations.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) $2\pi \sqrt{\frac{M\eta }{L}}$

(2) $2\pi \sqrt{\frac{L}{M\eta }}$

(3) $2\pi \sqrt{\frac{ML}{\eta }}$

(4) $2\pi \sqrt{\frac{M}{\eta L}}$

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

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) $h^{1/2}{c}^{-3/2}{G}^{1/2}$

(2) $h^{1/2}{c}^{3/2}{G}^{1/2}$

(3) $h^{1/2}{c}^{-3/2}{G}^{-1/2}$

(4) $h^{-1/2}{c}^{-3/2}{G}^{1/2}$

X = 3YZ² find dimension of Y in (MKSA) system, if X and Z are the dimension of capacity and magnetic field respectively

(1) $M^{-3}{L}^{-2}{T}^{-4}{A}^{-1}$

(2) ML^–2

(3) $M^{-3}{L}^{-2}{T}^4{A}^4$

(4) $M^{-3}{L}^{-2}{T}^8{A}^4$

In the relation $P=\frac{\alpha }{\beta }{e}^{-\frac{\alpha Z}{k\theta }}$, 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) $\left[M^0{L}^2{T}^0\right]$

(2) $\left[M^1{L}^2{T}^1\right]$

(3) $\left[M^1{L}^0{T}^{-1}\right]$

(4) $\left[M^0{L}^2{T}^{-1}\right]$

The frequency of vibration of string is given by $\nu =\frac{p}{2l}{\left[\frac{F}{m}\right]}^{1/2}$. Here p is number of segments in the string and l is the length. The dimensional formula for m will be

(1) $\left[M^{0}L{T}^{-1}\right]$

(2) $\left[M{L}^0{T}^{-1}\right]$

(3) $\left[M{L}^{-1}{T}^0\right]$

(4) $\left[M^0{L}^0{T}^0\right]$

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

A wire has a mass of \((0.3\pm0.003)\) grams, a radius of \((0.5\pm 0.005)\) mm, and a length of \((0.6\pm0.006)\) cm. The maximum percentage error in the measurement of its density will be:
1. \(1\)
2. \(2\)
3. \(3\)
4. \(4\)

If \(97.52\) is divided by \(2.54\), the correct result in terms of significant figures is:

Assertion : ‘Light year’ and ‘Wavelength’ both measure distance.

Reason : Both have dimensions of time.