Sample Solution Paper 8: Physics, Class 11 | Physics for Grade 11 PDF Download

 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.