1. Specific heat capacity, specific gas constant have-
Ans: same dimensions
2. One of the following does not have negative dimensions in mass.
Absolute Permittivity, Capacity, Universal Gravitation Constant, Resistance
Ans: Resistance
3. The dimensional formula of coefficient of thermal conductivity is-
Ans: [MLT-3K-1]
4. If B is magnetic induction, I is current and υυ is frequency then BI/υ
2 has the dimensions of-
Ans: Mass
5. Coefficient of friction has-
Ans: no dimensions.
6. One of the following quantities has dimensions
Plane angle, Solid angle, Srrain, Modulus of Elasticity
Ans: Modulus of Elasticity
7. The velocity V of a body is related to its displacement S as
The dimensional formulae of A, B and C are-Ans: [LT-1], [L2T-1], [L]
8. If the units of Mass, Length and Time are doubled, the unit of momentum is-
Ans: doubled
Ans: doubled
9. If the unit of Mass is doubled, unit of Length is halved the numerical value of pressure becomes-
Ans: 1/4 times
Ans: 1/4 times
10. If units of Mass, Length and time are changed as 1/2 kg, 2m and 10 S respectively what will be the new unit of power?
Ans: 1/500 W
Ans: 1/500 W
11. The value of coefficient of viscosity in cgs system is 12 poise. Its value in SI units is-
Ans: 1.2 NSm-2
Ans: 1.2 NSm-2
12. The work done by a body is 100 J. What will be its numerical value if the new units of mass, length and time are respectively 0.1 Kg, 0.1 m and 0.1 s?
Ans: 1000
Ans: 1000
