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41.

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

42.

The dimensions of $\frac{\mathrm{a}}{\mathrm{b}}$ in the equation $\mathrm{p}=\frac{\mathrm{a}-{\mathrm{t}}^{2}}{\mathrm{bx}}$where, p is pressure, x is distance and and t is time, are

[M

^{2}LT^{-3}][MT

^{-2}][LT

^{-3}][ML

^{3}T^{-1}]

43.

The dimensional formula for inductance is

[ML

^{2}T^{-2}A^{-2}][ML

^{2}TA^{-2}][ML

^{2}T^{-1}A^{-2}][ML

^{2}T^{-2}A^{-1}]

44.

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

linear momentum

angular momentum

Boltzmann constant

force

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46.

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

47.

The physical quantity having the dimensions [M^{-1}L^{-3}T^{3}A^{2}] is

resistance

resistivity

electrical conductivity

electromotive force

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49.

Dimensional formula for the universal gravitational constant G is

[M

^{-1}L^{2}T^{-2}][M

^{0}L^{0}T^{0}][M

^{-1}L^{3}T^{-2}][M

^{-1}L^{3}T^{-1}]

50.

The number of significant figures in the numbers 4.8000 x 10^{4} and 48000.50 are respectively

5 and 6

5 and 7

2 and 7

2 and 6

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