EWT | Academic Question

Questions
Question (1)
QN0034667

The dimensions of pressure is equal to

  • (A)

    force per unit volume

  • (B)

    energy per unit volume

  • (C)

    force

  • (D)

    energy

Correct Answer: B
Explanation:

(b)  Pressure

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Question (2)
QN0034668

The dimensional formula of angular velocity is    

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: D
Explanation:

(d) Angular velocity

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Question (3)
QN0034669

The physical quantity that has no dimensions is  

  • (A)

    strain

  • (B)

    angular velocity

  • (C)

    angular momentum

  • (D)

    linear momentum

Correct Answer: A
Explanation:

(a) Strain

Hence no dimension.

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Question (4)
QN0034670

Which is dimensionless?

  • (A)

    Force/acceleration

  • (B)

    Volume/area

  • (C)

    Velocity/acceleration

  • (D)

    Energy/work

Correct Answer: D
Explanation:

(d) Both energy and work have same unit

energy/work is a pure number.

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Question (5)
QN0034671

Dimensions of specific heat are

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: D
Explanation:

(d)

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Question (6)
QN0034672

The dimensions of torque are

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: B
Explanation:

(b)  Torque  Force  [distance]

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Question (7)
QN0034673

The dimensional formula for magnetic flux is

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: A
Explanation:

(a) Dimension of magnetic flux

Dimension of voltage  Dimension of time

Voltage

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Question (8)
QN0034674

The dimensions of magnetic field in  and  (coulomb) is given as

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: C
Explanation:

(c) We know that

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Question (9)
QN0034675

The dimensions of coefficient of self inductance are

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: A
Explanation:

(a) Energy stored in an inductor,

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Question (10)
QN0034676
  1. Which of the following is not a dimensionless quantity?
  • (A)

    Relative magnetic permeability 

  • (B)

    Power factor

  • (C)

    Permeability of free space 

  • (D)

    Quality factor

Correct Answer: C
Explanation:

(c) As

Clearly,  is not a dimensionless quantity.

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