The unit of permittivity of free space ${\epsilon }_0$ is

1. Coulomb/Newton-metre

2. Newton-metre²/Coulomb²

3. Coulomb²/(Newton-metre)²

4. Coulomb²/Newton-metre²

The position of a particle at time t is given by the relation $l =\frac{v_o}{\alpha }(1-e^{\alpha t})$ , where v₀ is a constant and α > 0. The dimensions of v₀ and α are respectively

1. $M^0{L}^1{T}^{-1}$ and T^–1

2. $M^0{L}^1{T}^0$ and T^–1

3. $M^0{L}^1{T}^{-1}$ and LT^–2

4. $M^0{L}^1{T}^{-1}$ and T

If radius of the sphere is (5.3 ± 0.1)cm. Then percentage error in its volume will be 

1. $3+6.01\times \frac{100}{5.3}$

2. $\frac{1}{3}\times 0.01\times \frac{100}{5.3}$

3. $\left(\frac{{\displaystyle 3\times 0.1}}{{\displaystyle 5.3}}\right)\times 100$

4. $\frac{0.1}{5.3}\times 100$

The pressure on a square plate is measured by measuring the force on the plate and the length of the sides of the plate. If the maximum error in the measurement of force and length are respectively 4% and 2%. The maximum error in the measurement of pressure is 

1. 1%

2. 2%

3. 6%

4. 8%

While measuring the acceleration due to gravity by a simple pendulum, a student makes a positive error of 1% in the length of the pendulum and a negative error of 3% in the value of time period. His percentage error in the measurement of g by the relation $g=4{\pi }^2(l/T^2)$ will be

1. 2%

2. 4%

3. 7%

4. 10%

Dimensions of strain are:

1. $ML{T}^{-1}$

2. $M{L}^2{T}^{-1}$

3. $ML{T}^{-2}$

4. $M^0{L}^0{T}^0$

An athletic coach told his team that muscle times speed equals power. What dimensions does he view for muscle?

1. $ML{T}^{-2}$

2. $M{L}^2{T}^{-2}$

3. MLT²

4. L

The quantities A and B are related by the relation, m = A/B, where m is the linear density and A is the force. The dimensions of B are of

1. Pressure

2. Work

3. Latent heat

4. None of the above

The frequency of vibration f of a mass m suspended from a spring of spring constant K is given by a relation of this type $f=C{m}^x{K}^y$; where C is a dimensionless quantity. The value of x and y are 

1. $x=\frac{1}{2},y=\frac{1}{2}$

2. $x=-\frac{1}{2},y=-\frac{1}{2}$

3. $x=\frac{1}{2},y=-\frac{1}{2}$

4. $x=-\frac{1}{2},y=\frac{1}{2}$

Dimensions of one or more pairs are same. Identify the pairs

1. Torque and work

2. Angular momentum and work

3. Energy and Young's modulus

4. Year and wavelength