Important Questions of Units and Measurement Physics | Zigya

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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

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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

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

2751 Views

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

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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

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