## JEE Units and Dimensions (Physics)

Question 1 |

Unit of energy in SI system is

**Related:** Mathematics JEE Mains Practice Test

Calorie | |

Electron volt | |

Erg | |

Joule |

Question 2 |

Young's modulus of a material has the same units as

Pressure | |

Compressibility | |

Force | |

Strain |

Question 3 |

Which of the following is dimensionally correct?

Pressure = Momentum per unit volume per unit time | |

Pressure = Force per unit volume | |

Pressure = Energy per unit area | |

Pressure = Energy per unit volume |

Question 4 |

Which is the correct unit for measuring nuclear radii

Fermi | |

Angstrom | |

Micron | |

Millimetre |

Question 5 |

Temperature can be expressed as a derived quantity in terms of any of the following

Length and mass | |

None of these | |

Mass and time | |

Length, mass and time |

Question 6 |

In which of the following systems of unit, Weber is the unit of magnetic flux

None of these | |

CGS | |

MKS | |

SI |

Question 7 |

In C.G.S. system the magnitude of the force is 100

*dynes*. In another system where the fundamental physical quantities are kilogram,*metre*and minute, the magnitude of the force is0.036 | |

36 | |

0.36 | |

3.6 |

Question 8 |

Which of the following is not the unit of time?

Leap year | |

Micro second | |

Lunar months | |

Parallactic second |

Question 9 |

Universal time is based on

Oscillations of quartz crystal | |

Rotation of the earth on its axis | |

Earth's orbital motion around the earth | |

Vibrations of cesium atom |

Question 10 |

What is the SI unit of permeability

Henry per metre | |

Tesla metre per ampere | |

Weber per ampere metre | |

All the above units are correct |

Question 11 |

Which of the following pairs of physical quantities has the same dimensions?

Work and power | |

Work and energy | |

Momentum and energy | |

Force and power |

Question 13 |

Of the following quantities, which one has dimensions different from the remaining three

Force per unit area | |

Product of voltage and charge per unit volume | |

Angular momentum per unit mass | |

Energy per unit volume |

Question 14 |

Dimensions of the following three quantities are the same

Potential energy, kinetic energy, momentum | |

Work, energy, force | |

Pressure, stress, coefficient of elasticity | |

Velocity, momentum, impulse |

Question 15 |

Which physical quantities have the same dimension?

Work and power | |

Latent heat and specific heat | |

Force and power | |

Couple of force and work |

Question 16 |

Which of the following quantities has the same dimensions as that of energy?

Work | |

Momentum | |

Force | |

Power |

Question 17 |

Which of the following is not a unit of energy

W - s | |

Joule | |

kg – m /sec | |

N - m |

Question 18 |

The dimensional formula for impulse is same as the dimensional formula for

Torque | |

Momentum | |

Rate of change of momentum | |

Force |

Question 19 |

The foundations of dimensional analysis were laid down by

Fourier | |

Gallileo | |

Joule | |

Newton |

Question 20 |

Wavelength of ray of light is 0.00006 m. It is equal to

600 microns | |

0.6 microns | |

6 microns | |

60 microns |

Question 21 |

Light year is a unit of

Distance | |

Time | |

Mass | |

Energy |

Question 22 |

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

MKS | |

CGS | |

SI | |

FPS |

There are 22 questions to complete.

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