1)

The time period of revolution of mars around the sun in years is

Class 11 Physics

A)

0.24

B)

1

C)

1.88

D)

0.615

2)

Gravitation is the

Class 11 Physics

A)

Central force

B)

Magnetic force

C)

Radial force

D)

None

3)

The gravitational force is attractive because

Class 11 Physics

A)

F is along -r

B)

F is not along r

C)

F is along r

D)

None

4)

The gravitational force is

Class 11 Physics

A)

Both a and b

B)

Central

C)

Attractive

D)

None

5)

The numerical value of gravitational constant is

Class 11 Physics

A)

Both a and b

B)

6.66*10-11 N/kg2

C)

6.67*1011 N/Kg2

D)

None

6)

As we go down the earth’s surface the acceleration due to gravity decreases by factor

Class 11 Physics

A)

(1 + d/Re)

B)

(1 – d/Re)

C)

(1 – d)

D)

(1 + d)

7)

The escape speed or escape velocity is given by

Class 11 Physics

A)

Both a and b

B)

11.2km/s

C)

√2gRe

D)

None

8)

The escape speed for the moon is found to be

Class 11 Physics

A)

Both a and b

B)

11.2km/s

C)

2.3km/s

D)

None

9)

Earth satellites revolve around the earth in

Class 11 Physics

A)

Both a and b

B)

Elliptical orbits

C)

Circular orbits

D)

None

10)

While considering motion of an object under the gravitational force of another object which of the following quantities are conserved.

Class 11 Physics

A)

Linear momentum

B)

Total mechanical energy

C)

Angular momentum

D)

Both a and b