Physics – Class 11 Mock Test 7

10%

Question 1 of 10

1. What is the angular velocity of parking satellites?

pi/2 rad/hr

pi/6 rad/hr

pi/3 rad/hr

pi/12 rad/hr

Question 1 of 10

Question 2 of 10

2. Hooke’s law states that _________

stress and strain are never directly proportional

stress is proportional to strain under elastic limit

stress is always proportional to strain

stress is proportional to strain before ultimate tensile strength

Question 2 of 10

Question 3 of 10

3. A wire with a radius of 5mm is hung freely from the ceiling. A load of 5N is applied to its free end. Find the elongation in the wire if its volume is 7.85*10^-5m³ & young’s modulus is 10¹¹N/m².

6.21*10^-7m

7.00*10^-7m

6.36*10^-7m

8.00*10^-9m

Question 3 of 10

Question 4 of 10

4. A geostationary satellite cannot orbit in any plane other than the equatorial plane.

True

False

Question 4 of 10

Question 5 of 10

5. An object is weightless inside a uniform spherical shell.

True

False

Question 5 of 10

Question 6 of 10

6. Which of the following statements is correct for ductile materials.

Cannot be drawn into wires

Have no proportional limit

Large deformation takes place between elastic limit and fracture point

Break immediately after proportional limit

Question 6 of 10

Question 7 of 10

7. A satellite of mass “m” orbits a planet “P” in an elliptical orbit. The satellite is then transferred to another circular orbit of radius “r” as shown in the figure. Which of the following hold true in this scenario?

Both kinetic and potential energy of the satellite is increased on the new orbit

The kinetic energy of the satellite is decreased and the potential energy of the satellite is increased in the new orbit

The kinetic energy of the satellite is increased and the potential energy of the satellite is decreased in the new orbit

Both kinetic and potential energy of the satellite is decreased on the new orbit

Question 7 of 10

Question 8 of 10

8. The orbital velocity of a satellite orbiting the earth is half the escape velocity of the earth. What is the height above the surface of the earth at which it is orbiting? (Let the radius of the earth (R) = 6400 km).

3200 km

6400 km

4800 km

9600 km

Question 8 of 10

Question 9 of 10

9. Which of the following stresses causes change in density, as long as force acts on the body?

Volumetric stress

Tensile stress

Compressive Stress

Shear stress

Question 9 of 10

Question 10 of 10

10. CARTOSAT is a group of geostationary satellites sent up by India.

False

True

Question 10 of 10