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A satellite is moving on a circular path of radius r around the earth has a time period T.If its radius slightly increases by Δr,the change in its time period is

(A)

3/2(T/r)Δr

(B)

2/3(T/r)Δr

(C)

3/2(T^{2}/r^{2})Δr

(D)

None of these

Question-2

In a vernier callipers N divisions of vernier scale coincide with N - 1 divisions of main scale (in which length of one division is 1 mm).The least count of the instrument should be

(A)

N

(B)

N - 1

(C)

1/10N

(D)

1/(N - 1)

Question-3

If x = at +bt^{2} ,where x is the distance travelled by the body in kilometer while t is the time in second,then the unit of b is

(A)

km/s

(B)

km s

(C)

km/s^{2}

(D)

km s^{2}

Question-4

"Pascal - second" has the dimensions of:

(A)

force

(B)

energy

(C)

pressure

(D)

Coeffecient of viscosity

Question-5

Chandrasekhar Limit is the unit of:

(A)

Distance

(B)

Time

(C)

Intensity

(D)

Mass

Question-6

The dimensional formula for surface tension is

(A)

[MLT^{-2]}

(B)

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

(C)

[MLT^{-1]}

(D)

[M^{1}L^{0}T^{-2}]

Question-7

The dimensional formula of angular momentum is

(A)

MLT^{-2}

(B)

ML^{-1}T^{-}

(C)

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

(D)

MLT^{-1}

Question-8

Light year is a unit of:

(A)

Time

(B)

Speed

(C)

Distance

(D)

None of these

Question-9

If an instrument gives nearly equal values in repeated measurements, it possess

(A)

Accuracy

(B)

Precession

(C)

Both accuracy and precession

(D)

Sensitivity

Question-10

A certain body weighs 22.42 g and has a measured volume of 4.7 cc.The possible error in the measurement of mass and volume are 0.01 g and 0.1 cc.Then maximum error in the density will be

(A)

22%

(B)

2%

(C)

0.2%

(D)

0.02%

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