## Units and Measurement Questions and Answers Part-5

1. What is the SI unit of permeability
a) Henry per metre
b) Tesla metre per ampere
c) Weber per ampere metre
d) All the above units are correct

Explanation: All the above units are correct

2. In which of the following systems of unit, Weber is the unit of magnetic flux
a) CGS
b) MKS
c) SI
d) None of these

Explanation: SI

3. Tesla is a unit for measuring
a) Magnetic intensity
b) Magnetic induction
c) Both a and b
d) Magnetic pole strength

Explanation: Both a and b

4. If the unit of length and force be increased four times, then the unit of energy is
a) Increased 4 times
b) Increased 8 times
c) Increased 16 times
d) Decreased 16 times

Explanation: Energy = force * distance, so if both are increased by 4 times then energy will increase by 16 times

5. Oersted is a unit of
a) Dip
b) Magnetic intensity
c) Magnetic moment
d) Pole strength

Explanation: 1 Oerstead = 1 Gauss = 10-4 Tesla

6. $Ampere-hour$    is a unit of
a) Quantity of electricity
b) Strength of electric current
c) Power
d) Energy

Explanation: Charge = current * time

7. The unit of specific resistance is
a) $Ohm-cm^{2}$
b) Ohm/cm
c) $Ohm-cm$
d) $\left(Ohm-cm\right)^{-1}$

Explanation:

8. The binding energy of a nucleon in a nucleus is of the order of a few
a) eV
b) Ergs
c) MeV
d) Volts

Explanation: MeV

9. Parsec is a unit of
a) Distance
b) Velocity
c) Time
d) Angle

10. If $u_{1} and u_{2}$  are the units selected in two systems of measurement and $n_{1}and n_{2}$  their numerical values, then
a) $n_{1}u_{1}=n_{2}u_{2}$
b) $n_{1}u_{1}+n_{2}u_{2}=0$
c) $n_{1}n_{2}=u_{1}u_{2}$
d) $\left(n_{1}+u_{1}\right)=\left(n_{2}+u_{2}\right)$