Recent questions tagged #mcq

0 votes

0 answers

The ratio of the magnitude of potential energy and kinetic energy of a satellite is

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Weightlessness experienced while orbiting the earth in spaceship, is the result of

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

If the gravitational attraction of earth suddenly disappears, then which of the following statement is

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Study the following statements and choose the incorrect option. I. `G` is not equal to `6.67 xx 10^(-11)Nm^(-2)kg^(-2)` on the surface of earth.II. The escape velocity on the surface of earth is lesser than the escape velocity from moon’s surface. III. The angular momentum of a satellite going around the earth remains conserved.IV. The relation, `g=(GM)/r^2` holds good for r all the celestial

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Match the Column I (quantities) with Column II (approximate values) and select the correct answer from the codes given below. Column I Column II A. Escape velocity of earth p. `1.6 m'/'s^2` B. Gravitational acceleration at moon’s surface q. `6400 km` C. Radius of earth r. `11.2 km'/'s`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

A satellite of mass m revolving with a velocity v around the earth. With reference to the above situation, match the Column I (types of energy) with Column II (expression) and select the correct answer from the codes given below. Column I Column II A. Kinetic energy of the satellite p. `-1/2mv^2` B. Potential energy of the satellite q. `1/2mv^2` C. Total energy of the satellite r. `-mv^2`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: Newton’s law of universal gravitation states that a particle attracts every other particle in the universe using a force of attraction that is directly proportional to the product of their masses and inversely proportional to the square of distance between them.Reason: Law of gravitation is analogous to magnetic force between the moving

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: The value of acceleration due to gravity does not depend upon mass of the body on which force is applied. Reason: Acceleration due to gravity is a variable

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: As we go up the surface of the earth, we feel light weighed than on the surface of the earth. Reason: The acceleration due to gravity decreases on going up above the surface of the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: Work done by or against gravitational force in moving a body from one point to another is independent of the actual path followed between the two points. Reason: This is because gravitational forces are conservative in

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: If gravitational potential at some point is positive, then the gravitational field strength at that point will also be zero. Reason: Except at infinity gravitational potential due to a system of point masses at some finite distance cannot be

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: The force of attraction between a hollow spherical shell of uniform density and a point mass situated inside it, is zero. Reason: The value of G does not depend on the nature and size of the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: Moon has no atmosphere. Reason: The escape speed for the moon is much

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: The escape velocity for a planet is `v_e=sqrt(2gR)`. If the radius of the planet is four times, the escape velocity becomes half `(i.e. v_e'=(v_e)/2)`.Reason: In the relation for escape velocity, `v_e =sqrt(2gR)`, the acceleration due to gravity `g` is inversely proportional to radius of the planet. Thus, `v_e prop

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: The velocity of the satellite increases as its height above earth’s surface increases and is minimum near the surface of the earth. Reason: The velocity of the satellite is directly proportional to square root of its height above earth’s

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: A satellite moves around the earth in a circular orbit under the action of gravity. A person in the satellite experience zero gravity field in the satellite. Reason: The contact force by the surface on the person is not

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: The total energy of the satellite is always negative irrespective of the nature of its orbit, i.e. elliptical or circular and it cannot be positive or zero. Reason: If the total energy is negative the satellite would leave its

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: The geo-stationary satellite goes around the earth in west-east direction. Reason Geo-stationary satellites orbits around the earth in the equatorial plane with `T=24 h` same as that of the rotation of the earth around its

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: In the satellite, everything inside it is in a state of free fall. Reason: Every part and parcel of the satellite has zero

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Assertion: An object is weightless when it is in free fall and this phenomenon is called weightlessness. Reason: In free fall, there is upward force acting on the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

Recent questions tagged #mcq

Categories