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# Sample Solution Paper 8: Physics, Class 11 Notes | EduRev

## Class 11 : Sample Solution Paper 8: Physics, Class 11 Notes | EduRev

``` Page 1

CBSE  | Physics
Sample Paper 8 Solution

CBSE Board
Class XI Physics
Sample Paper-8 Solution

1.

2.
While swimming, a person pushes the water backwards, and as a result he himself is
pushed forward by the reaction force exerted by the water on him.

3.
The angle of repose is defined as the angle of the inclined plane at which a body placed on
it, just begins to slide.
In the figure

Thus, the coefficient of limiting friction is equal to the tangent of the angle of repose.

Page 2

CBSE  | Physics
Sample Paper 8 Solution

CBSE Board
Class XI Physics
Sample Paper-8 Solution

1.

2.
While swimming, a person pushes the water backwards, and as a result he himself is
pushed forward by the reaction force exerted by the water on him.

3.
The angle of repose is defined as the angle of the inclined plane at which a body placed on
it, just begins to slide.
In the figure

Thus, the coefficient of limiting friction is equal to the tangent of the angle of repose.

CBSE  | Physics
Sample Paper 8 Solution

4.
Mass, m = 75 kg;

5.
No. The correct unit of torque is newton-metre, and not joule. This is done to create a
difference between the scalar nature of work and the vector nature of torque.

6.
The graph of h vs r is

7.

8.
Wave motion

9.
(i) M
3/2
L
-1/2
T
-2

(ii) M
1/2
L
-3/2
T
0

Page 3

CBSE  | Physics
Sample Paper 8 Solution

CBSE Board
Class XI Physics
Sample Paper-8 Solution

1.

2.
While swimming, a person pushes the water backwards, and as a result he himself is
pushed forward by the reaction force exerted by the water on him.

3.
The angle of repose is defined as the angle of the inclined plane at which a body placed on
it, just begins to slide.
In the figure

Thus, the coefficient of limiting friction is equal to the tangent of the angle of repose.

CBSE  | Physics
Sample Paper 8 Solution

4.
Mass, m = 75 kg;

5.
No. The correct unit of torque is newton-metre, and not joule. This is done to create a
difference between the scalar nature of work and the vector nature of torque.

6.
The graph of h vs r is

7.

8.
Wave motion

9.
(i) M
3/2
L
-1/2
T
-2

(ii) M
1/2
L
-3/2
T
0

CBSE  | Physics
Sample Paper 8 Solution

10.

11.

12.
Work done is defined as the product of component of force along the direction of motion
and displacement.

13.
2 / 0.05
2 / 50
1000 / 10 /
?
?
??
v
k
cm s m s
?
?
?

Page 4

CBSE  | Physics
Sample Paper 8 Solution

CBSE Board
Class XI Physics
Sample Paper-8 Solution

1.

2.
While swimming, a person pushes the water backwards, and as a result he himself is
pushed forward by the reaction force exerted by the water on him.

3.
The angle of repose is defined as the angle of the inclined plane at which a body placed on
it, just begins to slide.
In the figure

Thus, the coefficient of limiting friction is equal to the tangent of the angle of repose.

CBSE  | Physics
Sample Paper 8 Solution

4.
Mass, m = 75 kg;

5.
No. The correct unit of torque is newton-metre, and not joule. This is done to create a
difference between the scalar nature of work and the vector nature of torque.

6.
The graph of h vs r is

7.

8.
Wave motion

9.
(i) M
3/2
L
-1/2
T
-2

(ii) M
1/2
L
-3/2
T
0

CBSE  | Physics
Sample Paper 8 Solution

10.

11.

12.
Work done is defined as the product of component of force along the direction of motion
and displacement.

13.
2 / 0.05
2 / 50
1000 / 10 /
?
?
??
v
k
cm s m s
?
?
?

CBSE  | Physics
Sample Paper 8 Solution

14.

15.
(a) PV
?
= constant, where ? = C P/C V
(b)
(i)
1
TV
??
= constant
(ii)
1-
PT
?
?
= constant
or
1-
PT
??
= constant

16.
An ideal or a perfect gas possesses the following two characteristics:
(i) The size of the molecules of the gas is zero, i.e. each molecule is only a point mass with
no dimensions.
(ii) There is no force of attraction between the molecules.
OR

l
T2
g
?? where l is effective length.
Initially as the level of water drops, the effective length of the pendulum increases and this
increases the time period. When the hollow sphere is completely empty, the effective
length decreases due to rise in centre of gravity and the time period reduces to its original
time period.

Page 5

CBSE  | Physics
Sample Paper 8 Solution

CBSE Board
Class XI Physics
Sample Paper-8 Solution

1.

2.
While swimming, a person pushes the water backwards, and as a result he himself is
pushed forward by the reaction force exerted by the water on him.

3.
The angle of repose is defined as the angle of the inclined plane at which a body placed on
it, just begins to slide.
In the figure

Thus, the coefficient of limiting friction is equal to the tangent of the angle of repose.

CBSE  | Physics
Sample Paper 8 Solution

4.
Mass, m = 75 kg;

5.
No. The correct unit of torque is newton-metre, and not joule. This is done to create a
difference between the scalar nature of work and the vector nature of torque.

6.
The graph of h vs r is

7.

8.
Wave motion

9.
(i) M
3/2
L
-1/2
T
-2

(ii) M
1/2
L
-3/2
T
0

CBSE  | Physics
Sample Paper 8 Solution

10.

11.

12.
Work done is defined as the product of component of force along the direction of motion
and displacement.

13.
2 / 0.05
2 / 50
1000 / 10 /
?
?
??
v
k
cm s m s
?
?
?

CBSE  | Physics
Sample Paper 8 Solution

14.

15.
(a) PV
?
= constant, where ? = C P/C V
(b)
(i)
1
TV
??
= constant
(ii)
1-
PT
?
?
= constant
or
1-
PT
??
= constant

16.
An ideal or a perfect gas possesses the following two characteristics:
(i) The size of the molecules of the gas is zero, i.e. each molecule is only a point mass with
no dimensions.
(ii) There is no force of attraction between the molecules.
OR

l
T2
g
?? where l is effective length.
Initially as the level of water drops, the effective length of the pendulum increases and this
increases the time period. When the hollow sphere is completely empty, the effective
length decreases due to rise in centre of gravity and the time period reduces to its original
time period.

CBSE  | Physics
Sample Paper 8 Solution

17.

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