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A dimensionless quantity...

A dimensionless quantity

A

Never has unit

B

Always has a unit

C

May have a unit

D

Does not exist

Text Solution

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The correct Answer is:
C
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ALLEN-MISCELLANEOUS-Exercise-02
  1. The unit of three physical quantities x, y and z are g cm^(2)' s^(-5),...

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  2. If the unit of length be doubled then the numerical value of the unive...

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  3. A dimensionless quantity

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  4. The Bernoulli's equation is given by P+1/2 rho v^(2)+h rho g=k. Where ...

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  5. When a wave transverses in a medium, the displacement of a particle lo...

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  6. The van der wasl's equation of a gas is (P+(aT^(2))/V) V^(c)=(RT+b). W...

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  7. Two quantities A and B are related by A//B=m where m is linear mass de...

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  8. A physical quantity x can dimensionally represented in terms of M, L a...

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  9. If the velocity of light c, gravitational constant G and Planck's cons...

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  10. A calorie is a unit of heat energy and it equals about 4.2 J, where 1J...

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  11. Angle between the vectors vec(a)=-hat(i)+2hat(j)+hat(k) and vec(b)=xha...

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  12. Three forces P,Q and R are acting at a point in the plane. The angle b...

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  13. Let vec(a), vec(b), vec(c) be vectors of length 3, 4, 5 respectively. ...

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  14. Let vec(a), vec(b), vec(c) are three unit vector such that vec(a)+vec(...

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  15. If the sum of two unit vectors is a unit vector,then find the magnitud...

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  16. X- component of vec(a) is twice of its Y- component. If the magnitude ...

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  17. If vec(a) is a vector and x is a non-zero scalar, then

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  18. The two vectors vec(A) and vec(B) are drawn from a common point and ve...

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  19. Which of the following expressions are meaningful?

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  20. If the vectors vec a , vec b ,a n d vec c form the sidesB C ,C Aa n d...

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