# Physics MCQs for Class 9 with Answers Chapter 4

#### Physics MCQs for Class 9 with Answers

The orbital velocity of a satellite revolving at height ‘h’ above the surface of Earth is given by

________ is the height of an object or place above sea level.
Altitude
Depth
Sun
Moon

The force exerted by earth on moon is :
2.01× 1020 N
2.01× 1020 Kg
2.01× 1021 N
2.01× 1022 Kg m/s2

A body is placed at height ‘h’ above the surface of the Earth.The value of ‘g’ is given by
gh = Me/(R + h)2
gh = GMe/(R +h)2
gh = GMe/R2h

The velocity of geostationary satellites with respect to the Earth is:
Maximum
Zero
Minimum
100 ms-1

The value of G is __________ Nm2 kg-2.
6.67 x 10-11 Nm2 kg-1
6.67 x 10-11Nm2kg
6.67 x 10-11Nm2kg-2
6.67 x 10-11Nm kg-1

The speed of satellites in GPS is:
8.73 kms-1
3.87 ms-1
32 ms-1
3.87 kms-1

The altitude of geostationary orbits in which communication satellites are launched above the surface of the Earth is
850 km
1000 km
6400 km
42,300 km

The value of g at a height one Earth’s radius above the surface of the Earth is:
2 g
1/2 g
1/3 g1
1/4 g

Weight of the body when we increase its height from earth’s surface.
Increase
Decrease
Remain constant
None

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