1:   The time period of a geostationary satellite is
Options:
1. 12h
2. 24 h
3. 6h
4. 48 h

Explanation:

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2:   If we consider solar system consisting of the earth and sun only as of the ideal thermodynamic system. The sun works as source of energy having temperature 6000 K and earth as sink having temperature 300 K, the efficiency of solar system would be on the basis of exchange of radiations
Options:
1. 30%
2. 65%
3. 75%
4. 95%

Explanation:

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3:   If gE and gM are the accelerations due to gravity on the surfaces of the earth and the moon respectively and if Millikan's oil drop experiment could be performed on the two surfaces, one will find the ratio electronic charge on the moon/ electronic charge on the earth to be
Options:
1. 1
2. 0
3. gE/gM
4. gM/gE

Explanation:

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4:   Two satellites of earth, S1 and S2, are moving in the same orbit. The mass of S1 is four times the mass of S2. Which one of the following statement is true
Options:
1. the time period of S1 is four times that of S2
2. the potential energies of earth and satellite in the two cases are equal
3. S1 and S2 are moving with the same speed
4. the kinetic energies of the two satellites are equal

Explanation:

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5:   The escape velocity from the earth is nearly 11.2 km/s. In a planet, whose radius is two times the radius of the earth and density is equal to that of the earth, the escape velocity will be
Options:
1. 22.4 km/s
2. 11.2 km/s
3. 5.6 km/s
4. 15.6 km/s

Explanation:

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6:   The value of g on the surface of earth is smallest at the equator because
Options:
1. the centripetal force is maximum at equator
2. the centripetal force is least at equator
3. the angular speed of earth is maximum at equator
4. the angular speed of earth is least at equator

Explanation:

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7:   The value of g decreases inside the surface of earth because
Options:
1. a force of upward attraction is applied by the cell of earth above
2. the shell of earth above exerts no net force
3. the distance from the center of the earth decreases
4. the density of he material at the center of the earth is very small

Explanation:

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8:   The dimension of moment of inertia is
Options:
1. ML-2T0
2. ML2T0
3. M-1L2T
4. M-1L2T-1

Explanation:

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9:   A satellite of mass m is moving in a circular orbit of radius R above the surface of a planet of mass M and radius R. The amount of work done to shift the satellite to higher orbit of radius 2R is
Options:
1. mgR
2. mgR/6
3. mMgR/(M+m)
4. mMgR/6(M+m)

Explanation:

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10:   The escape velocity of a particle of mass m varies as
Options:
1. m2
2. m
3. m0
4. m-1

Explanation:

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That which does not kill me, makes me stronger.
-Friedrich Nietzsche