EWT | Academic Question

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Question (11)
QN0034677

The dimensions of mobility are 

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: B
Explanation:

(b) Mobility

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Question (12)
QN0034678

Which one of the following represents the correct dimensions of the coefficient of viscosity?

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: A
Explanation:

(a) From stokes law

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Question (13)
QN0034679

The ratio of the dimensions of Planck's constant and that of the moment of inertia is the dimensions of

  • (A)

    time

  • (B)

    frequency

  • (C)

    angular momentum

  • (D)

    velocity

Correct Answer: B
Explanation:

(b)  [As  ]

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Question (14)
QN0034680

Dimensions of 'resistance' are same as (where  is Planck's constant and  is charge)

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: C
Explanation:

(c)  Resistance (ohm)

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Question (15)
QN0034681

If  denotes the inductance of an inductor through which a current  is flowing, the dimensions of  are

  • (A)

  • (B)

  • (C)

  • (D)

    Not expressible in M,L,T

Correct Answer: A
Explanation:

(a) Energy stored in an inductor

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Question (16)
QN0034682

Which one of the following represents the correct dimensions of the gravitational constant?

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: A
Explanation:

(a)

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Question (17)
QN0034683

If electronic charge , electron mass , speed of light in vacuum  and Planck's constant  are taken as fundamental quantities, the permeability of vacuum  can be expressed in units of

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: C
Explanation:

(c) Let  related with  and  as follows.

On comparing both sides we get

...(i).

By equation (i), (ii), (iii) & (iv) we get,

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