Units and Measurements MCQ Practice Test – NEET Physics (Free)

In an experiment, four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively. Quantity P is calculated as follows

. % error in P is

7%
4%
14%
10%

Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I, would be)

[ML²T^–2]
[ML²T^–1I^–1]
[ML²T^–3I^–2]
[ML²T^–3I^–1]

In an experiment the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2%, 3% and 4% respectively. Then the maximum percentage of error in the measurement X, where X =

, will be

10%
(3/13)%
16%
–10%

If dimensions of critical velocity v_c of a liquid flowing through a tube are expressed as [h^xr^yr^z] where h, r and r are the coefficient of viscosity of liquid, density of liquid and radius of the tube respectively, then the values of x, y and z are given by

–1, –1, –1
1, 1, 1
1, –1, –1
–1, –1, 1

The density of a cube is measured by measuring its mass and length of its sides. If the maximum error in the measurement of mass and lengths are 3% and 2% respectively, the maximum error in the measurement of density would be

12%
14%
7%
9%

The dimensional formula of torque is

[ML²T^–2]
[MLT^–2]
[ML^–1T^–2]
[ML^–2T^–2]

The unit of thermal conductivity is

W m^–1 K^–1
J m K^–1
J m^–1 K^–1
W m K^–1

The frequency of vibration f of a mass m suspended from a spring of spring constant k is given by a relation f = am^xk^y, where a is a dimensionless constant. The value of x and y are