﻿ Medical Entrance Exam Question and Answers | Units and Measurement - Zigya

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# Units and Measurement

#### Multiple Choice Questions

1.

If energy (E), velocity (v) and time (T) are chosen  as the fundamental quantities, the dimensional formula of surface tension will be

• [Ev-2T-1]

• [Ev-1T-2]

• [Ev-2T-2]

• [Ev-2T-2]

6867 Views

2.

The dimensions of  are

• [L1/2 T-1/2]

• [L-1T]

• [LT-1]

• [LT-1]

1137 Views

3.

If force (F), velocity (v) and time (T) are taken as fundamental units, then the dimensions of mass are

• [FvT-1]

• [FvT-2]

• [Fv-1T-1]

• [Fv-1T-1]

2139 Views

4.

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:

P = , error in P is

• 14 %

• 10 %

• 7 %

• 7 %

3312 Views

5.

The dimensions of  are

• [L-1T]

• [LT-]

• [L-1/2 T1/2]

• [L-1/2 T1/2]

357 Views

6.

The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. if the speed of the liquid in the tube is v, the speed of the ejection of the liquid through the holes is

• vR2/n2r2

• vR2/nr2

• vR2/n3r2

• vR2/n3r2

2751 Views

7.

The density of material in CGS system of units is 4g/ cm2.In a system of units in which unit of lengths is 10 cm and unit of mass is 100 g, the value of density of material will be

• 0.4

• 40

• 400

• 400

941 Views

8.

The dimension of , is permittivity of free space and E is electric field is

• [ML2T-2]

• [ML-1T-3]

• [ML2T-1]

• [ML2T-1]

523 Views

9.

If the dimensions of a physical quantity are given by Ma Lb Tc, the physical quantity will be

• pressure if a = 1, b = -1, c= 2

• velocity if a = 1, b = 1, c = -2

• acceleration if a = 1, b = 1, c =-2

• acceleration if a = 1, b = 1, c =-2

729 Views

10.

If the error in the measurement of radius of sphere is 2%, then the error in the determination of volume of the sphere will be

• 4%

• 6%

• 8%

• 8%

456 Views