Number of base SI units is

1. 4

2. 7

3. 3

4. 5

SI unit of permittivity is:

1. $C^2{m}^2{N}^{-1}$

2. $C^{-1}{m}^2{N}^{-2}$

3. $C^2{m}^2{N}^2$

4. $C^2{m}^{-2}{N}^{-1}$

Which does not has the same unit as others

1. Watt-sec

2. Kilowatt-hour

3. eV

4. J-sec

Which of the following system of units is not based on units of mass, length and time alone

1. SI

2. MKS

3. FPS

4. CGS

The unit of the coefficient of viscosity in S.I. system is

1. $m/kg\text{-}s$

2. $m\text{-}s\text{}/\text{}k{g}^2$

3. $kg\text{}/\text{}m\text{-}{s}^2$

4. $kg\text{}/\text{}m\text{-}s$

The unit of Young’s modulus is

1. $N{m}^2$

2. $N{m}^{-2}$

3. Nm

4. $N{m}^{-1}$

One femtometer is equivalent to

1. ${10}^{15}m$

2. ${10}^{-15}m$

3. ${10}^{-12}m$

4. ${10}^{12}m$

How many wavelengths of $K{r}^{86}$ are there in one metre

1. 1553164.13

2. 1650763.73

3. 652189.63

4. 2348123.73

Which of the following pairs is wrong?

1. Pressure-Baromter

2. Relative density-Pyrometer

3. Temperature-Thermometer

4. Earthquake-Seismograph