The dimensional formula for impulse is from Physics Units and Me

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 Multiple Choice QuestionsMultiple Choice Questions

41.

A plate has a length 5 ± 0.1 cm and breadth 2 ± 0.01 cm. Then the area of the plate is

  • 10 ± 0.1 cm2

  • 10 ± 0.01 cm2

  • 10 ± 0.001 cm2

  • 10 ± 1 cm2


42.

If M = Mass, L = Length, T = Time and I = Electric current, then the dimensional formula for electrical resistance R is given by

  • [R] = [M1L2T-3I-2]

  • [R] = [M1L2T-3I2]

  • [R] = [M1L2T3I-2]

  • [R] = [M1L2T3I2]


43.

A body is moving at a speed near 0.3 ms-1. To measure its speed with an accuracy about 1%, using a sampling distance 3 mm, the measuring clock should have a least count of the order of

  • 0.1 s

  • 0.01 s

  • 0.001 s

  • 0.0001 s


44.

The dimensions of ab in the equation p = a - t2bxwhere, p is pressure, x is distance and and t is time, are

  • [M2LT-3]

  • [MT-2]

  • [LT-3]

  • [ML3T-1]


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45.

The dimensional formula for inductance is

  • [ML2T-2A-2]

  • [ML2TA-2]

  • [ML2T-1A-2]

  • [ML2T-2A-1]


46.

The physical quantity having the same dimensions as Planck's constant h is

  • linear momentum

  • angular momentum

  • Boltzmann constant

  • force


47.

SI unit of permittivity is

  • C2m2N2

  • C2m-2N-1

  • C2m2N-1

  • C-1m2N-2


48.

Out of the following four dimensional quantities, which one qualifies to be called a dimensional constant ?

  • Acceleration due to gravity

  • Surface tension of water

  • Weight of a standard kilogram mass

  • The velocity of light in vacuum


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49.

The physical quantity having the dimensions [M-1L-3T3A2] is

  • resistance

  • resistivity

  • electrical conductivity

  • electromotive force


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50.

The dimensional formula for impulse is

  • [MLT-1]

  • [ML-1T]

  • [M-1LT-1]

  • [ML-1T-1]


A.

[MLT-1]

Impulse = force × time = [MLT-2] [T]

            = [MLT-1


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