Class 12 Exam > Class 12 Notes > Sample Papers for Class 12 Medical and Non-Medical > Physics: Sample Solution Paper- 4, Class 12
Physics: Sample Solution Paper- 4, Class 12 | Sample Papers for Class 12 Medical and Non-Medical PDF Download
| Download, print and study this document offline |
Please wait while the PDF view is loading
Page 1
CBSE XII | PHYSICS
Sample Paper – 4 Solution
CBSE Board
Class XII – Physics
Sample Paper – 4 Solution
1. The proton A and the electron B will experience electrostatic force of equal magnitude
but in opposite direction.
2. As
mv
r
qB
? , for same v and B, .
m
r
q
? Since
m
q
is smaller for an electron, the radius of
the circular path followed by the electron will be smaller.
3. The human eye is most sensitive for
14
5.405 10 . Hz ?
4. Induced current in the loop will be in the clockwise direction to oppose its origin.
5. Since
? ?
12
1 1 1
1 n
f R R
??
? ? ?
??
??
Taking
? ?
12
21
1
,,
n
R R R R
fR
?
? ? ? ? …. (1)
When lens is cut, then
12
11
,,
'
n
R R R
fR
?
? ? ? ? …..(2)
Using equation (1) and equation (2), we get
' 2 60 f f cm ??
6. No, matter waves are not electromagnetic waves.
The de Broglie wave equation is ? ?
h
mv
7. A rectifier conducts only in forward biased and not in reverse biased. But a transistor
conducts either ways. Hence, a transistor cannot be used as a rectifier.
8. The negative energy of the electron orbiting around nucleus keeps it bounded with the
nucleus. If the energy of the electron becomes positive, the electron will no longer be
bounded with the nucleus.
Page 2
CBSE XII | PHYSICS
Sample Paper – 4 Solution
CBSE Board
Class XII – Physics
Sample Paper – 4 Solution
1. The proton A and the electron B will experience electrostatic force of equal magnitude
but in opposite direction.
2. As
mv
r
qB
? , for same v and B, .
m
r
q
? Since
m
q
is smaller for an electron, the radius of
the circular path followed by the electron will be smaller.
3. The human eye is most sensitive for
14
5.405 10 . Hz ?
4. Induced current in the loop will be in the clockwise direction to oppose its origin.
5. Since
? ?
12
1 1 1
1 n
f R R
??
? ? ?
??
??
Taking
? ?
12
21
1
,,
n
R R R R
fR
?
? ? ? ? …. (1)
When lens is cut, then
12
11
,,
'
n
R R R
fR
?
? ? ? ? …..(2)
Using equation (1) and equation (2), we get
' 2 60 f f cm ??
6. No, matter waves are not electromagnetic waves.
The de Broglie wave equation is ? ?
h
mv
7. A rectifier conducts only in forward biased and not in reverse biased. But a transistor
conducts either ways. Hence, a transistor cannot be used as a rectifier.
8. The negative energy of the electron orbiting around nucleus keeps it bounded with the
nucleus. If the energy of the electron becomes positive, the electron will no longer be
bounded with the nucleus.
CBSE XII | PHYSICS
Sample Paper – 4 Solution
9.
(i) water ? ?
2
HO
(ii) oxygen ? ?
2
O
The ratio of permittivity of a medium to the permittivity of vacuum is called dielectric
constant for the medium.
10. Resistance =
A
?
2
4
dr
dR
r
?
?
?
? Total resistance
2
2
2
1
1
1
44
r
r
r
r
dr
rr
??
??
??
? ? ?
??
??
?
12
11
4
R
rr
?
?
??
??
??
??
11. When current flows through a solenoid, it flows in same direction in each turn as shown
in the figure below. As current through each turn is in same direction, they attract each
other.
Hence, the solenoid contracts in length.
Page 3
CBSE XII | PHYSICS
Sample Paper – 4 Solution
CBSE Board
Class XII – Physics
Sample Paper – 4 Solution
1. The proton A and the electron B will experience electrostatic force of equal magnitude
but in opposite direction.
2. As
mv
r
qB
? , for same v and B, .
m
r
q
? Since
m
q
is smaller for an electron, the radius of
the circular path followed by the electron will be smaller.
3. The human eye is most sensitive for
14
5.405 10 . Hz ?
4. Induced current in the loop will be in the clockwise direction to oppose its origin.
5. Since
? ?
12
1 1 1
1 n
f R R
??
? ? ?
??
??
Taking
? ?
12
21
1
,,
n
R R R R
fR
?
? ? ? ? …. (1)
When lens is cut, then
12
11
,,
'
n
R R R
fR
?
? ? ? ? …..(2)
Using equation (1) and equation (2), we get
' 2 60 f f cm ??
6. No, matter waves are not electromagnetic waves.
The de Broglie wave equation is ? ?
h
mv
7. A rectifier conducts only in forward biased and not in reverse biased. But a transistor
conducts either ways. Hence, a transistor cannot be used as a rectifier.
8. The negative energy of the electron orbiting around nucleus keeps it bounded with the
nucleus. If the energy of the electron becomes positive, the electron will no longer be
bounded with the nucleus.
CBSE XII | PHYSICS
Sample Paper – 4 Solution
9.
(i) water ? ?
2
HO
(ii) oxygen ? ?
2
O
The ratio of permittivity of a medium to the permittivity of vacuum is called dielectric
constant for the medium.
10. Resistance =
A
?
2
4
dr
dR
r
?
?
?
? Total resistance
2
2
2
1
1
1
44
r
r
r
r
dr
rr
??
??
??
? ? ?
??
??
?
12
11
4
R
rr
?
?
??
??
??
??
11. When current flows through a solenoid, it flows in same direction in each turn as shown
in the figure below. As current through each turn is in same direction, they attract each
other.
Hence, the solenoid contracts in length.
CBSE XII | PHYSICS
Sample Paper – 4 Solution
12. Due to the applied e.m.f. E, the current ‘I’ in the inductor will be such that:
or
dI E
E L dI dt
dt L
??
00
sin
or sin
E t dt E
dI I t dt
LL
?
? ??
?
0
cos
E
It
L
?
?
??
0
or sin
2
??
??
??
?
? I I t
Where
0
0
E
I
L ?
?
13. Here
1 2 2
100 , 10 , 20 q q C r cm r cm ? ? ? ? ?
Work done is
1 2 2 1
0 1 2
4
?? ?
?
??
??
??
qq r r
W
rr
? ?
2
69
2
10 1
100 10 9 10
200 10
?
?
??
? ? ? ? ?
??
??
450 J ?
14. When light is put off, a large e.m.f. is produced to oppose the decay of current in the
circuit. This large induced e.m.f. across the gap causes sparking in the switch.
OR
Iron bar experiences a retarding force. It means eddy currents are there, which are
produced whenever there is a change in magnetic flux. So we conclude that iron bar is a
magnet.
15. A stationary charge produces only an electric field around it. When a charge moves with
a constant velocity it produces a constant magnetic field in addition to the electric field.
As the charge is accelerated, both electric and magnetic fields change with time and
space. One becomes the source of the other, thus giving electromagnetic waves.
Page 4
CBSE XII | PHYSICS
Sample Paper – 4 Solution
CBSE Board
Class XII – Physics
Sample Paper – 4 Solution
1. The proton A and the electron B will experience electrostatic force of equal magnitude
but in opposite direction.
2. As
mv
r
qB
? , for same v and B, .
m
r
q
? Since
m
q
is smaller for an electron, the radius of
the circular path followed by the electron will be smaller.
3. The human eye is most sensitive for
14
5.405 10 . Hz ?
4. Induced current in the loop will be in the clockwise direction to oppose its origin.
5. Since
? ?
12
1 1 1
1 n
f R R
??
? ? ?
??
??
Taking
? ?
12
21
1
,,
n
R R R R
fR
?
? ? ? ? …. (1)
When lens is cut, then
12
11
,,
'
n
R R R
fR
?
? ? ? ? …..(2)
Using equation (1) and equation (2), we get
' 2 60 f f cm ??
6. No, matter waves are not electromagnetic waves.
The de Broglie wave equation is ? ?
h
mv
7. A rectifier conducts only in forward biased and not in reverse biased. But a transistor
conducts either ways. Hence, a transistor cannot be used as a rectifier.
8. The negative energy of the electron orbiting around nucleus keeps it bounded with the
nucleus. If the energy of the electron becomes positive, the electron will no longer be
bounded with the nucleus.
CBSE XII | PHYSICS
Sample Paper – 4 Solution
9.
(i) water ? ?
2
HO
(ii) oxygen ? ?
2
O
The ratio of permittivity of a medium to the permittivity of vacuum is called dielectric
constant for the medium.
10. Resistance =
A
?
2
4
dr
dR
r
?
?
?
? Total resistance
2
2
2
1
1
1
44
r
r
r
r
dr
rr
??
??
??
? ? ?
??
??
?
12
11
4
R
rr
?
?
??
??
??
??
11. When current flows through a solenoid, it flows in same direction in each turn as shown
in the figure below. As current through each turn is in same direction, they attract each
other.
Hence, the solenoid contracts in length.
CBSE XII | PHYSICS
Sample Paper – 4 Solution
12. Due to the applied e.m.f. E, the current ‘I’ in the inductor will be such that:
or
dI E
E L dI dt
dt L
??
00
sin
or sin
E t dt E
dI I t dt
LL
?
? ??
?
0
cos
E
It
L
?
?
??
0
or sin
2
??
??
??
?
? I I t
Where
0
0
E
I
L ?
?
13. Here
1 2 2
100 , 10 , 20 q q C r cm r cm ? ? ? ? ?
Work done is
1 2 2 1
0 1 2
4
?? ?
?
??
??
??
qq r r
W
rr
? ?
2
69
2
10 1
100 10 9 10
200 10
?
?
??
? ? ? ? ?
??
??
450 J ?
14. When light is put off, a large e.m.f. is produced to oppose the decay of current in the
circuit. This large induced e.m.f. across the gap causes sparking in the switch.
OR
Iron bar experiences a retarding force. It means eddy currents are there, which are
produced whenever there is a change in magnetic flux. So we conclude that iron bar is a
magnet.
15. A stationary charge produces only an electric field around it. When a charge moves with
a constant velocity it produces a constant magnetic field in addition to the electric field.
As the charge is accelerated, both electric and magnetic fields change with time and
space. One becomes the source of the other, thus giving electromagnetic waves.
CBSE XII | PHYSICS
Sample Paper – 4 Solution
16. Image of the object is formed at focus of objective. This image acts like an object for
virtual image of
1
L . Now virtual image produced by
1
L should be located at the focus of
2
. L
Since
12
2 /3 L L f ?
Image distance from
1
is /3 L v f ??
1 1 1
f v u
? ? ?
1 3 1
f f u
? ? ?
/4 uf ? ? ?
17.
(i) Actual depth t =12.5 cm
Apparent depth a = 9.4 cm
12.5
1.33
9.4
aw
t
a
? ? ? ?
(ii) 1.63
al
? ?
12.5
7.7
1.63
l
al
t
a cm
?
? ? ?
Therefore, the microscope has to be moved by ? ? 9.4 7.7 , cm ? i.e., 1.7 cm
18. The capacitor can be considered as split into two capacitors in series as shown below
Here,
1 2 0
12
22
o
K A k A
c and c
dd
??
??
The capacitance of capacitors in series is
12
1 1 1
c c c
??
12
12
cc
c
cc
??
?
12
12
2
o
A kk
c
d k k
???
?
??
?
??
Page 5
CBSE XII | PHYSICS
Sample Paper – 4 Solution
CBSE Board
Class XII – Physics
Sample Paper – 4 Solution
1. The proton A and the electron B will experience electrostatic force of equal magnitude
but in opposite direction.
2. As
mv
r
qB
? , for same v and B, .
m
r
q
? Since
m
q
is smaller for an electron, the radius of
the circular path followed by the electron will be smaller.
3. The human eye is most sensitive for
14
5.405 10 . Hz ?
4. Induced current in the loop will be in the clockwise direction to oppose its origin.
5. Since
? ?
12
1 1 1
1 n
f R R
??
? ? ?
??
??
Taking
? ?
12
21
1
,,
n
R R R R
fR
?
? ? ? ? …. (1)
When lens is cut, then
12
11
,,
'
n
R R R
fR
?
? ? ? ? …..(2)
Using equation (1) and equation (2), we get
' 2 60 f f cm ??
6. No, matter waves are not electromagnetic waves.
The de Broglie wave equation is ? ?
h
mv
7. A rectifier conducts only in forward biased and not in reverse biased. But a transistor
conducts either ways. Hence, a transistor cannot be used as a rectifier.
8. The negative energy of the electron orbiting around nucleus keeps it bounded with the
nucleus. If the energy of the electron becomes positive, the electron will no longer be
bounded with the nucleus.
CBSE XII | PHYSICS
Sample Paper – 4 Solution
9.
(i) water ? ?
2
HO
(ii) oxygen ? ?
2
O
The ratio of permittivity of a medium to the permittivity of vacuum is called dielectric
constant for the medium.
10. Resistance =
A
?
2
4
dr
dR
r
?
?
?
? Total resistance
2
2
2
1
1
1
44
r
r
r
r
dr
rr
??
??
??
? ? ?
??
??
?
12
11
4
R
rr
?
?
??
??
??
??
11. When current flows through a solenoid, it flows in same direction in each turn as shown
in the figure below. As current through each turn is in same direction, they attract each
other.
Hence, the solenoid contracts in length.
CBSE XII | PHYSICS
Sample Paper – 4 Solution
12. Due to the applied e.m.f. E, the current ‘I’ in the inductor will be such that:
or
dI E
E L dI dt
dt L
??
00
sin
or sin
E t dt E
dI I t dt
LL
?
? ??
?
0
cos
E
It
L
?
?
??
0
or sin
2
??
??
??
?
? I I t
Where
0
0
E
I
L ?
?
13. Here
1 2 2
100 , 10 , 20 q q C r cm r cm ? ? ? ? ?
Work done is
1 2 2 1
0 1 2
4
?? ?
?
??
??
??
qq r r
W
rr
? ?
2
69
2
10 1
100 10 9 10
200 10
?
?
??
? ? ? ? ?
??
??
450 J ?
14. When light is put off, a large e.m.f. is produced to oppose the decay of current in the
circuit. This large induced e.m.f. across the gap causes sparking in the switch.
OR
Iron bar experiences a retarding force. It means eddy currents are there, which are
produced whenever there is a change in magnetic flux. So we conclude that iron bar is a
magnet.
15. A stationary charge produces only an electric field around it. When a charge moves with
a constant velocity it produces a constant magnetic field in addition to the electric field.
As the charge is accelerated, both electric and magnetic fields change with time and
space. One becomes the source of the other, thus giving electromagnetic waves.
CBSE XII | PHYSICS
Sample Paper – 4 Solution
16. Image of the object is formed at focus of objective. This image acts like an object for
virtual image of
1
L . Now virtual image produced by
1
L should be located at the focus of
2
. L
Since
12
2 /3 L L f ?
Image distance from
1
is /3 L v f ??
1 1 1
f v u
? ? ?
1 3 1
f f u
? ? ?
/4 uf ? ? ?
17.
(i) Actual depth t =12.5 cm
Apparent depth a = 9.4 cm
12.5
1.33
9.4
aw
t
a
? ? ? ?
(ii) 1.63
al
? ?
12.5
7.7
1.63
l
al
t
a cm
?
? ? ?
Therefore, the microscope has to be moved by ? ? 9.4 7.7 , cm ? i.e., 1.7 cm
18. The capacitor can be considered as split into two capacitors in series as shown below
Here,
1 2 0
12
22
o
K A k A
c and c
dd
??
??
The capacitance of capacitors in series is
12
1 1 1
c c c
??
12
12
cc
c
cc
??
?
12
12
2
o
A kk
c
d k k
???
?
??
?
??
CBSE XII | PHYSICS
Sample Paper – 4 Solution
OR
Let ? be the surface charge density of capacitor plates of area A. Electric field
between the plates in the air space is
o
o
E
?
?
?
As in case of conducting slab ?
po
EE net electric field inside the conducting slab is
zero.
Now potential difference between the plates of capacitor is
? ? ? ?
o
o
V E d t d t
?
?
? ? ? ?
QA ? ?
1/
oo
AC Q
C
V d t t d
?
? ? ?
??
Where
o
o
EA
C
d
?
19. Since 100 ? ?
3
2 10 A
?; ?; ?
?
??
? ? ?
c
CE BE BC
I
V V V
Read More
|
159 docs|4 tests
|
FAQs on Physics: Sample Solution Paper- 4, Class 12 - Sample Papers for Class 12 Medical and Non-Medical
| 1. What is the definition of physics? |  |
Ans. Physics is a branch of science that deals with the study of matter, energy, and the interactions between them.
| 2. What are the main branches of physics? | |
Ans. The main branches of physics include classical mechanics, thermodynamics, electromagnetism, optics, quantum mechanics, and relativity.
| 3. How does physics relate to everyday life? | |
Ans. Physics is everywhere in our daily lives, from the technology we use to the natural phenomena we observe. It helps us understand how things work, such as the motion of objects, the behavior of light, and the functioning of electronic devices.
| 4. What are some real-life applications of physics? | |
Ans. Physics has numerous real-life applications, including the development of medical imaging technologies like MRI, the design of electrical circuits, the understanding of climate change, and the creation of renewable energy sources.
| 5. What are the important laws and principles in physics? | |
Ans. Some important laws and principles in physics include Newton's laws of motion, the laws of thermodynamics, Ohm's law, the conservation of energy, and the principle of relativity. These laws and principles provide a framework for understanding and predicting physical phenomena.
About this Document
|
4.71/5 Rating |
|
Dec 24, 2024 Last updated |
Document Description: Physics: Sample Solution Paper- 4, Class 12 for Class 12 2024 is part of Sample Papers for Class 12 Medical and Non-Medical preparation.
The notes and questions for Physics: Sample Solution Paper- 4, Class 12 have been prepared according to the Class 12 exam syllabus. Information about Physics: Sample Solution Paper- 4, Class 12 covers topics
like and Physics: Sample Solution Paper- 4, Class 12 Example, for Class 12 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Physics: Sample Solution Paper- 4, Class 12.
Introduction of Physics: Sample Solution Paper- 4, Class 12 in English is available as part of our Sample Papers for Class 12 Medical and Non-Medical
for Class 12 & Physics: Sample Solution Paper- 4, Class 12 in Hindi for Sample Papers for Class 12 Medical and Non-Medical course.
Download more important topics related with notes, lectures and mock test series for Class 12
Exam by signing up for free. Class 12: Physics: Sample Solution Paper- 4, Class 12 | Sample Papers for Class 12 Medical and Non-Medical
Description
Full syllabus notes, lecture & questions for Physics: Sample Solution Paper- 4, Class 12 | Sample Papers for Class 12 Medical and Non-Medical - Class 12 | Plus excerises question with solution to help you revise complete syllabus for Sample Papers for Class 12 Medical and Non-Medical | Best notes, free PDF download
Information about Physics: Sample Solution Paper- 4, Class 12
In this doc you can find the meaning of Physics: Sample Solution Paper- 4, Class 12 defined & explained in the simplest way possible. Besides explaining types of
Physics: Sample Solution Paper- 4, Class 12 theory, EduRev gives you an ample number of questions to practice Physics: Sample Solution Paper- 4, Class 12 tests, examples and also practice Class 12
tests
|
159 docs|4 tests
|
Download as PDF
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
study material
,Viva Questions
,video lectures
,shortcuts and tricks
,Sample Paper
,Extra Questions
,MCQs
,Physics: Sample Solution Paper- 4
,Important questions
,Class 12 | Sample Papers for Class 12 Medical and Non-Medical
,Summary
,mock tests for examination
,Exam
,Previous Year Questions with Solutions
,practice quizzes
,Class 12 | Sample Papers for Class 12 Medical and Non-Medical
,Objective type Questions
,Physics: Sample Solution Paper- 4
,ppt
,Class 12 | Sample Papers for Class 12 Medical and Non-Medical
,Semester Notes
,past year papers
,Free
,Physics: Sample Solution Paper- 4
;
Additional Information about Physics: Sample Solution Paper- 4, Class 12 for Class 12 Preparation
Physics: Sample Solution Paper- 4, Class 12 Free PDF Download
The Physics: Sample Solution Paper- 4, Class 12 is an invaluable resource that delves deep into the core of the Class 12 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Physics: Sample Solution Paper- 4, Class 12 now and kickstart your journey towards success in the Class 12 exam.
Importance of Physics: Sample Solution Paper- 4, Class 12
The importance of Physics: Sample Solution Paper- 4, Class 12 cannot be overstated, especially for Class 12 aspirants.
This document holds the key to success in the Class 12 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Physics: Sample Solution Paper- 4, Class 12 Notes
Physics: Sample Solution Paper- 4, Class 12 Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Physics: Sample Solution Paper- 4, Class 12.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Physics: Sample Solution Paper- 4, Class 12 Notes on EduRev are your ultimate resource for success.
Physics: Sample Solution Paper- 4, Class 12 Class 12 Questions
The "Physics: Sample Solution Paper- 4, Class 12 Class 12 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 12 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Physics: Sample Solution Paper- 4, Class 12 on the App
Students of Class 12 can study Physics: Sample Solution Paper- 4, Class 12 alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Physics: Sample Solution Paper- 4, Class 12,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Physics: Sample Solution Paper- 4, Class 12 is prepared as per the latest Class 12 syllabus.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup