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# Sample Solution Paper 9: Physics, Class 11 Notes | EduRev

## Class 11 : Sample Solution Paper 9: Physics, Class 11 Notes | EduRev

``` Page 1

CBSE  | Physics
Sample Paper 9 Solution

CBSE Board
Class XI Physics
Sample Paper-9 Solution

1.
Dimension of a = dim of F × dimension of x
As dimension of LHS = dimension of RHS (each term)
a = [ML
2
T
-2
]

2.
No, it is not possible. In order to change the state of motion of a body, some net external
force must act on the body.

3.
Impulse and change in momentum are along the same direction. Therefore, angle between
these two vectors is zero degree.

4.
Work is done by the winning team. It is equal to the product of the resultant force applied
by the two teams and the displacement that the losing team suffers.

5.
It depends upon the shape and size of the body and the distribution of its mass.

6.
Since in case of a parachute fall, appreciable work is done against the non-conservative
force of friction, Bernoulli's equation as such cannot be applied.

7.
K is infinity for perfect heat conductor and K is Zero for perfect heat insulator.

8.

Page 2

CBSE  | Physics
Sample Paper 9 Solution

CBSE Board
Class XI Physics
Sample Paper-9 Solution

1.
Dimension of a = dim of F × dimension of x
As dimension of LHS = dimension of RHS (each term)
a = [ML
2
T
-2
]

2.
No, it is not possible. In order to change the state of motion of a body, some net external
force must act on the body.

3.
Impulse and change in momentum are along the same direction. Therefore, angle between
these two vectors is zero degree.

4.
Work is done by the winning team. It is equal to the product of the resultant force applied
by the two teams and the displacement that the losing team suffers.

5.
It depends upon the shape and size of the body and the distribution of its mass.

6.
Since in case of a parachute fall, appreciable work is done against the non-conservative
force of friction, Bernoulli's equation as such cannot be applied.

7.
K is infinity for perfect heat conductor and K is Zero for perfect heat insulator.

8.

CBSE  | Physics
Sample Paper 9 Solution

9.

10.
Speed of a moving body is defined as the rate of change of position of the body with respect
to time. It is measured by the distance travelled by the body in a unit time.

Velocity of a moving body is defined as the rate of change of position of the body along a
particular direction with respect to time.

OR
Damped oscillations are oscillations in which dissipative forces act as additional restoring
forces to continuously decrease the amplitude of oscillation.

Forced oscillations are oscillations whose amplitude is maintained by an external periodic
force which compensates for the energy loss in damped oscillations.

Resonant oscillations are those forced oscillations in which the frequency of driver force
matches with the natural frequency of the system resulting in large increase in amplitude.

11.
No, the bomb will not hit the target. At the time the bomb is released, it has horizontal
velocity same as that of the bomber. Due to this velocity (say u) it will fall a distance
u 2h g ? ahead of the target, where h is the height of the bomber when the bomb is
dropped.

Page 3

CBSE  | Physics
Sample Paper 9 Solution

CBSE Board
Class XI Physics
Sample Paper-9 Solution

1.
Dimension of a = dim of F × dimension of x
As dimension of LHS = dimension of RHS (each term)
a = [ML
2
T
-2
]

2.
No, it is not possible. In order to change the state of motion of a body, some net external
force must act on the body.

3.
Impulse and change in momentum are along the same direction. Therefore, angle between
these two vectors is zero degree.

4.
Work is done by the winning team. It is equal to the product of the resultant force applied
by the two teams and the displacement that the losing team suffers.

5.
It depends upon the shape and size of the body and the distribution of its mass.

6.
Since in case of a parachute fall, appreciable work is done against the non-conservative
force of friction, Bernoulli's equation as such cannot be applied.

7.
K is infinity for perfect heat conductor and K is Zero for perfect heat insulator.

8.

CBSE  | Physics
Sample Paper 9 Solution

9.

10.
Speed of a moving body is defined as the rate of change of position of the body with respect
to time. It is measured by the distance travelled by the body in a unit time.

Velocity of a moving body is defined as the rate of change of position of the body along a
particular direction with respect to time.

OR
Damped oscillations are oscillations in which dissipative forces act as additional restoring
forces to continuously decrease the amplitude of oscillation.

Forced oscillations are oscillations whose amplitude is maintained by an external periodic
force which compensates for the energy loss in damped oscillations.

Resonant oscillations are those forced oscillations in which the frequency of driver force
matches with the natural frequency of the system resulting in large increase in amplitude.

11.
No, the bomb will not hit the target. At the time the bomb is released, it has horizontal
velocity same as that of the bomber. Due to this velocity (say u) it will fall a distance
u 2h g ? ahead of the target, where h is the height of the bomber when the bomb is
dropped.

CBSE  | Physics
Sample Paper 9 Solution

12.

13.

14.

Page 4

CBSE  | Physics
Sample Paper 9 Solution

CBSE Board
Class XI Physics
Sample Paper-9 Solution

1.
Dimension of a = dim of F × dimension of x
As dimension of LHS = dimension of RHS (each term)
a = [ML
2
T
-2
]

2.
No, it is not possible. In order to change the state of motion of a body, some net external
force must act on the body.

3.
Impulse and change in momentum are along the same direction. Therefore, angle between
these two vectors is zero degree.

4.
Work is done by the winning team. It is equal to the product of the resultant force applied
by the two teams and the displacement that the losing team suffers.

5.
It depends upon the shape and size of the body and the distribution of its mass.

6.
Since in case of a parachute fall, appreciable work is done against the non-conservative
force of friction, Bernoulli's equation as such cannot be applied.

7.
K is infinity for perfect heat conductor and K is Zero for perfect heat insulator.

8.

CBSE  | Physics
Sample Paper 9 Solution

9.

10.
Speed of a moving body is defined as the rate of change of position of the body with respect
to time. It is measured by the distance travelled by the body in a unit time.

Velocity of a moving body is defined as the rate of change of position of the body along a
particular direction with respect to time.

OR
Damped oscillations are oscillations in which dissipative forces act as additional restoring
forces to continuously decrease the amplitude of oscillation.

Forced oscillations are oscillations whose amplitude is maintained by an external periodic
force which compensates for the energy loss in damped oscillations.

Resonant oscillations are those forced oscillations in which the frequency of driver force
matches with the natural frequency of the system resulting in large increase in amplitude.

11.
No, the bomb will not hit the target. At the time the bomb is released, it has horizontal
velocity same as that of the bomber. Due to this velocity (say u) it will fall a distance
u 2h g ? ahead of the target, where h is the height of the bomber when the bomb is
dropped.

CBSE  | Physics
Sample Paper 9 Solution

12.

13.

14.

CBSE  | Physics
Sample Paper 9 Solution

15.

Consider the above figure. The thermal efficiency of a heat engine is gives as:

16.
(a) Volume of 1 mole of a gas.
(b) Volume of 2 moles of gas.

17.
(a) It is meaningful, if both the scalars represent the same physical quantities.
(b) It is not permissible as the vector can only be added to another vector.
(c) It is permissible, e.g. mass multiplied with velocity.
(d) it is permissible, e.g. volume multiplied by density equals mass.
(e) It is permissible, if both the vectors represent the same physical quantity, otherwise
not. For example we can add the forces, but not force and velocity.
(f) It is permissible.

Page 5

CBSE  | Physics
Sample Paper 9 Solution

CBSE Board
Class XI Physics
Sample Paper-9 Solution

1.
Dimension of a = dim of F × dimension of x
As dimension of LHS = dimension of RHS (each term)
a = [ML
2
T
-2
]

2.
No, it is not possible. In order to change the state of motion of a body, some net external
force must act on the body.

3.
Impulse and change in momentum are along the same direction. Therefore, angle between
these two vectors is zero degree.

4.
Work is done by the winning team. It is equal to the product of the resultant force applied
by the two teams and the displacement that the losing team suffers.

5.
It depends upon the shape and size of the body and the distribution of its mass.

6.
Since in case of a parachute fall, appreciable work is done against the non-conservative
force of friction, Bernoulli's equation as such cannot be applied.

7.
K is infinity for perfect heat conductor and K is Zero for perfect heat insulator.

8.

CBSE  | Physics
Sample Paper 9 Solution

9.

10.
Speed of a moving body is defined as the rate of change of position of the body with respect
to time. It is measured by the distance travelled by the body in a unit time.

Velocity of a moving body is defined as the rate of change of position of the body along a
particular direction with respect to time.

OR
Damped oscillations are oscillations in which dissipative forces act as additional restoring
forces to continuously decrease the amplitude of oscillation.

Forced oscillations are oscillations whose amplitude is maintained by an external periodic
force which compensates for the energy loss in damped oscillations.

Resonant oscillations are those forced oscillations in which the frequency of driver force
matches with the natural frequency of the system resulting in large increase in amplitude.

11.
No, the bomb will not hit the target. At the time the bomb is released, it has horizontal
velocity same as that of the bomber. Due to this velocity (say u) it will fall a distance
u 2h g ? ahead of the target, where h is the height of the bomber when the bomb is
dropped.

CBSE  | Physics
Sample Paper 9 Solution

12.

13.

14.

CBSE  | Physics
Sample Paper 9 Solution

15.

Consider the above figure. The thermal efficiency of a heat engine is gives as:

16.
(a) Volume of 1 mole of a gas.
(b) Volume of 2 moles of gas.

17.
(a) It is meaningful, if both the scalars represent the same physical quantities.
(b) It is not permissible as the vector can only be added to another vector.
(c) It is permissible, e.g. mass multiplied with velocity.
(d) it is permissible, e.g. volume multiplied by density equals mass.
(e) It is permissible, if both the vectors represent the same physical quantity, otherwise
not. For example we can add the forces, but not force and velocity.
(f) It is permissible.

CBSE  | Physics
Sample Paper 9 Solution

18.

The pulley system with mass m 1 and m 2 is shown in the figure above. The tension T is same
throughout.

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