The cylindrical tube of a spray pump has radius R, one end of wh

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

61.

The S.I. unit of specific heat capacity is

  • JK-1

  • J kg-1

  • J mol-1 K-1

  • J kg-1 K-1


62.

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

63.

The dimensions of left parenthesis straight mu subscript straight o straight epsilon subscript straight o right parenthesis to the power of negative 1 divided by 2 end exponent are

  • [L1/2 T-1/2]

  • [L-1T]

  • [LT-1]

  • [LT-1]

1137 Views

64.

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

Advertisement
65.

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 = fraction numerator straight a cubed straight b squared over denominator cd end fraction space percent sign, error in P is

  • 14 %

  • 10 %

  • 7 %

  • 7 %

3312 Views

66.

The dimensions of left parenthesis straight mu subscript straight o straight epsilon subscript straight o right parenthesis to the power of negative 1 divided by 2 end exponent are

  • [L-1T]

  • [LT-]

  • [L-1/2 T1/2]

  • [L-1/2 T1/2]

357 Views

Advertisement

67.

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


B.

vR2/nr2

During the streamline of viscous and incompressible fluid through a pipe varying cross -section, the product of the area of cross section and normal fluid velocity (Av) remains constant throughout the flow.

Consider a cylindrical tube of a spray pump has radius R, one end having n fine holes, each of radius r and speed of liquid in the tube is v as shown in the figure.

According to equation of continuity

Av = constant

where A is a cylindrical tube and v is the velocity of the liquid in a tube. 

Volume in flow rate = volume an outflow rate

πR2v = nπr2v'

v' = R2v/nr2

Thus, speed of the ejection of the liquid through the holes is R2v/nr2



2751 Views

Advertisement
68.

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

Advertisement
69.

The dimension of 1 half straight epsilon subscript straight o straight E squared comma space where space straight epsilon subscript straight o, is permittivity of free space and E is electric field is 

  • [ML2T-2]

  • [ML-1T-3]

  • [ML2T-1]

  • [ML2T-1]

523 Views

70.

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

Advertisement