Wednesday, July 15, 2020
Sunday, July 12, 2020
Thursday, July 9, 2020
Thursday, July 2, 2020
Wednesday, July 1, 2020
Tuesday, June 30, 2020
Thursday, June 25, 2020
Wednesday, June 24, 2020
Sunday, May 17, 2020
Saturday, May 16, 2020
HOLIDAYS HOMEWORK MATHS
Chapter 1
1mark
1. If and the composite function then is equal to_________________.
2. Let R be the relation in the set Z of integers given by R= {(): 3 divides}.
Show that the relation R symmetric? Write the equivalence class [1].
3. Examine whether the operation * defined on R by a * b = ab + 1 is (i) a
binary or not. (ii) if a binary operation, is it associative or not ?
(2019BVM/65/1/1)
4. Examine whether the operation * defined on , the set of all real numbers, by
= is a binary operation or not, and if it is a binary operation, find whether it
is associative or not. (2019BVM/65/2/1)
5. If * is defined on the set R of all real numbers by *: a * b = , find the
identity element, if it exists in with respect to *. (2019BVM/65/3/1.3)
6. Let * be a binary operation on R – {– 1} defined by , for all a, b R – {–
1}.Show that * is neither commutative nor associative in R – {– 1}.
(2019/BVM/65/3/2)
4 marks
7. Let f: A → B be a function defined as f(x) =, where and B = . Is the function
f one - one and onto? Is f invertible? If yes, then find its inverse.
4
8. Show that the relation R on defined as R = {(a, b): a ≤ b}, is reflexive, and
transitive but not symmetric. (2019BVM/65/1/1)
OR
Prove that the function f: N N, defined by f(x) = x 2 + x + 1 is one-one but
not onto. Find inverse of f: N S, where S is range of f. (2019BVM/65/1/1)
9. Check whether the relation R defined on the set A = {1, 2, 3, 4, 5, 6} as
R={(a,b) : b = a + 1} is reflexive, symmetric or transitive.
(2019BVM/65/2/1)
OR
Let f: N Y be a function defined as f(x) = 4x + 3, where Y = {y N: y = 4x+
3, for some x N}. Show that f is invertible. Find its inverse.
(2019BVM/65/2/1)
10. Show that the relation R on the set Z of all integers, given by
R = {(a, b) : 2 divides (a – b)} is an equivalence relation.
(2019BVM/65/3/1.2.3)
OR
If f(x) = , show that fof(x) = x for all . Also, find the inverse of f.
(2019BVM/65/3/1.2.3)
1mark
1. If and the composite function then is equal to_________________.
2. Let R be the relation in the set Z of integers given by R= {(): 3 divides}.
Show that the relation R symmetric? Write the equivalence class [1].
3. Examine whether the operation * defined on R by a * b = ab + 1 is (i) a
binary or not. (ii) if a binary operation, is it associative or not ?
(2019BVM/65/1/1)
4. Examine whether the operation * defined on , the set of all real numbers, by
= is a binary operation or not, and if it is a binary operation, find whether it
is associative or not. (2019BVM/65/2/1)
5. If * is defined on the set R of all real numbers by *: a * b = , find the
identity element, if it exists in with respect to *. (2019BVM/65/3/1.3)
6. Let * be a binary operation on R – {– 1} defined by , for all a, b R – {–
1}.Show that * is neither commutative nor associative in R – {– 1}.
(2019/BVM/65/3/2)
4 marks
7. Let f: A → B be a function defined as f(x) =, where and B = . Is the function
f one - one and onto? Is f invertible? If yes, then find its inverse.
4
8. Show that the relation R on defined as R = {(a, b): a ≤ b}, is reflexive, and
transitive but not symmetric. (2019BVM/65/1/1)
OR
Prove that the function f: N N, defined by f(x) = x 2 + x + 1 is one-one but
not onto. Find inverse of f: N S, where S is range of f. (2019BVM/65/1/1)
9. Check whether the relation R defined on the set A = {1, 2, 3, 4, 5, 6} as
R={(a,b) : b = a + 1} is reflexive, symmetric or transitive.
(2019BVM/65/2/1)
OR
Let f: N Y be a function defined as f(x) = 4x + 3, where Y = {y N: y = 4x+
3, for some x N}. Show that f is invertible. Find its inverse.
(2019BVM/65/2/1)
10. Show that the relation R on the set Z of all integers, given by
R = {(a, b) : 2 divides (a – b)} is an equivalence relation.
(2019BVM/65/3/1.2.3)
OR
If f(x) = , show that fof(x) = x for all . Also, find the inverse of f.
(2019BVM/65/3/1.2.3)
Thursday, May 14, 2020
HOLIDAYS HOMEWORK GEOGRAPHY
Holiday Home Work
CLASS XII Geography
Ch. 1 Human Geography-Nature Scope,
Ch. 2 The
World population,
Ch.3
Population Composition
1. Reading Work:- Read the
all three chapters of Geography
2. Make 10 MCQ questions with answers from each chapters
3. What is the differences
between `Determinism’ and `Possibilism’ with example?
4. What is `Neodeterminism’?
Explain it with example.
5. Write the three stage of
Demographic Transition with example.
6. What is the factors
influencing the distribution of population? Explain with example.
Tuesday, May 12, 2020
HOLIDAYS HOMEWORK ENGLISH
KENDRIYA VIDYALAYA AFS NALIYA
CLASS: XII SUBJECT: ENGLISH
HOLIDAY HOMEWORK
1. Write summary of the following chapters;
1. Third Level
2. The Tiger King
3. The Last Lesson
4. Lost Spring
5. Deep Water
2. Write a debate on ‘Lockdown is an essential step to triumph covid-19
epidemic’.
3. Write any two advertisements.
4. Your school is going to celebrate ‘Environment Day’ on 5 June. As a
head boy/head girl of the school prepare a speech for the school
assembly.
5. Write a letter to place an order of 11 set computer for your school.
CLASS: XII SUBJECT: ENGLISH
HOLIDAY HOMEWORK
1. Write summary of the following chapters;
1. Third Level
2. The Tiger King
3. The Last Lesson
4. Lost Spring
5. Deep Water
2. Write a debate on ‘Lockdown is an essential step to triumph covid-19
epidemic’.
3. Write any two advertisements.
4. Your school is going to celebrate ‘Environment Day’ on 5 June. As a
head boy/head girl of the school prepare a speech for the school
assembly.
5. Write a letter to place an order of 11 set computer for your school.
HOLIDAYS HOMEWORK PHYSICS
CLASS-
Xll
SUBJECT-PHYSICS
Q.1 Derive the expression of Gauss’s law.
Q.2 Derive formulas
of intensity of electric field due to a dipole at axial point and equatorial
point.
Q.3 Derive the
expression of intensity of electric field due to a uniformly charged sphere at
outside, surface and inside point by using Gauss law and draw the graph also.
Q.4 Derive the
expression of intensity of electric field due to line charge distribution of
infinite length using Gauss law.
Q.5 Read chapter
02-electrostatic potential & capacitance and prepare short notes on the
given topics-
(i)
Electrostatic potential and potential difference
(ii)
Potential due to a conducting and non conducting sphere
(iii)
Potential due to an electric dipole at a point (r, Ѳ)
(iv)Electrostatic
potential energy due to a distribution of charges
(v)
Capacitance of a parallel plate capacitor
(vi)Energy
and energy density between plates of capacitor
(vii)
Series and parallel combination of capacitors
(viii)Wheatstone
bridge and its balanced condition
Q.6 Do first
exercise of chapter 01-electric charge and field.
Q.7 Do first
exercise of chapter 02-electrostatic potential and capacitance.
HOLIDAY HOME WORK HISTORY
HOLIDAY HOME WORK
CLASS- XII SUBJECT- HISTORY
CHAPTER 1- BRICKS, BEADS AND BONES
CHAPTER 2- KINGS, FARMERS AND TOWNS
CHAPTER 3- KINSHIP, CASTE AND CLASS
(1) READ THE CHAPTERS COMPLETELY AND WRITE BRIEF SUMMARY.
(2) WATCH RELATED VIDEOES ON YOUTUBE CHANNEL UPLOADED BY K V A F S TEACHERS.
(3) MAKE 20 MCQ TYPE QUESTIONS FROM EACH CHAPTER WITH ANSWER AND WRITE IN
COPY.
CLASS- XII SUBJECT- HISTORY
CHAPTER 1- BRICKS, BEADS AND BONES
CHAPTER 2- KINGS, FARMERS AND TOWNS
CHAPTER 3- KINSHIP, CASTE AND CLASS
(1) READ THE CHAPTERS COMPLETELY AND WRITE BRIEF SUMMARY.
(2) WATCH RELATED VIDEOES ON YOUTUBE CHANNEL UPLOADED BY K V A F S TEACHERS.
(3) MAKE 20 MCQ TYPE QUESTIONS FROM EACH CHAPTER WITH ANSWER AND WRITE IN
COPY.
HOLIDAYS HOMEWORK HINDI
केन्द्रीय विद्यालय , वायु सेना स्थल, नलिया
ग्रीष्मावकाश गृहकार्य (विषय : हिंदी)
कक्षा – बारहवीं
1. शहर में बढ़ती यातायात (ट्रैफिक) समस्या की ओर ध्यान आकृष्ट कराते हुए किसी
दैनिक समाचार-पत्र के संपादक को पत्र लिखिए।
2. जनसंचार और माध्यम के निम्नलिखित विषयों पर टिप्पणी लिखिए–
i) पत्रकारिता के प्रकार, ii) छह ककार iii) मुद्रित माध्यम (प्रिंट मीडिया)
3. निम्नलिखित सभी पाठों का ध्यानपूर्वक अध्ययन कर एक पृष्ठ में अपने शब्दों में पाठ का
सारांश लिखें-
i) बाजार दर्शन
ii) सिल्वर वैडिंग
4. ‘आत्मपरिचय और भक्तिन’ पाठों पर आधारित निम्नलिखित प्रश्नों के उत्तर लिखिए -
i) आत्मपरिचय कविता के कवि की संसार के बारे में क्या राय है?
ii) ‘जहां पर दाना रहते हैं वही नादान भी होते हैं।‘ कवि ने ऐसा क्यों कहा होगा ?
iii) भक्तिन अपना वास्तविक नाम लोगों से क्यों छुपाती थी ? इसको यह भक्तिन नाम
किसने और क्यों दिया ?
iv) ‘भक्तिन अच्छी है, यह कहना कठिन होगा, क्योंकि उसमें दुर्गुणों का अभाव नहीं।‘
लेखिका महादेवी वर्मा ने ऐसा क्यों कहा होगा ?
5. निम्नलिखित विषयों पर रचनात्मक लेख लिखें – (शब्द–सीमा 150 शब्द)
अ. वैश्विक महामारी-कोरोना और लॉकडाउन
ब. करत करत अभ्यास के जड़मति होत सुजान
स. बदलता युग- बदलती मान्यताएँ
ग्रीष्मावकाश गृहकार्य (विषय : हिंदी)
कक्षा – बारहवीं
1. शहर में बढ़ती यातायात (ट्रैफिक) समस्या की ओर ध्यान आकृष्ट कराते हुए किसी
दैनिक समाचार-पत्र के संपादक को पत्र लिखिए।
2. जनसंचार और माध्यम के निम्नलिखित विषयों पर टिप्पणी लिखिए–
i) पत्रकारिता के प्रकार, ii) छह ककार iii) मुद्रित माध्यम (प्रिंट मीडिया)
3. निम्नलिखित सभी पाठों का ध्यानपूर्वक अध्ययन कर एक पृष्ठ में अपने शब्दों में पाठ का
सारांश लिखें-
i) बाजार दर्शन
ii) सिल्वर वैडिंग
4. ‘आत्मपरिचय और भक्तिन’ पाठों पर आधारित निम्नलिखित प्रश्नों के उत्तर लिखिए -
i) आत्मपरिचय कविता के कवि की संसार के बारे में क्या राय है?
ii) ‘जहां पर दाना रहते हैं वही नादान भी होते हैं।‘ कवि ने ऐसा क्यों कहा होगा ?
iii) भक्तिन अपना वास्तविक नाम लोगों से क्यों छुपाती थी ? इसको यह भक्तिन नाम
किसने और क्यों दिया ?
iv) ‘भक्तिन अच्छी है, यह कहना कठिन होगा, क्योंकि उसमें दुर्गुणों का अभाव नहीं।‘
लेखिका महादेवी वर्मा ने ऐसा क्यों कहा होगा ?
5. निम्नलिखित विषयों पर रचनात्मक लेख लिखें – (शब्द–सीमा 150 शब्द)
अ. वैश्विक महामारी-कोरोना और लॉकडाउन
ब. करत करत अभ्यास के जड़मति होत सुजान
स. बदलता युग- बदलती मान्यताएँ
Monday, May 4, 2020
Friday, May 1, 2020
Thursday, April 30, 2020
Wednesday, April 29, 2020
Tuesday, April 28, 2020
Monday, April 27, 2020
Sunday, April 26, 2020
Saturday, April 25, 2020
Friday, April 24, 2020
Wednesday, April 22, 2020
Tuesday, April 21, 2020
Monday, April 20, 2020
Saturday, April 18, 2020
Friday, April 17, 2020
Wednesday, April 15, 2020
Tuesday, April 14, 2020
Monday, April 13, 2020
Physics, assignment of complete chap.01 electric charge & field
CHAPTER 1:
ELECTRIC CHARGE & FIELD
2 Marks questions:-
1. State vector
form of Coulomb Law.
2. Three equal charges Q are placed at corners of a
equilateral triangle of side l . Find out electric force at charge placed at
one corner of triangle.
3. Write 4 properties of electric lines of force.
4. State Gauss law & write its mathematical
expression.
5. Define electric dipole moment & write its SI unit.
6. Find the number of field lines originating from a
point charge q = 8.854 μc .
7. Derive an expression for the work done in rotating an
electric dipole from its equilibrium position to an angle θ with uniform
electrostatic field.
8. An electron & a proton fall through a distance in
an uniform electric field E .Compare the time of fall.
9. If q is the positive charge on each molecule of water,
what is the total positive charge in a mug of water (360 gm)?
10. What is the ratio of electric field intensity at a
point on the equatorial line to the field at a point on the axial line, when
the points are at same distance from the centre of the dipole?
3 marks questions:
1. Explain why charge given to a hollow conductor is
transferred immediately to outer surface of the conductor.
2. Using Gauss’s theorem in electrostatics, deduce an
expression for electric field intensity due to charged spherical shell at a
point (i)inside (ii)on it’s surface (iii)out sided it.
3. Derive an expression of work done in rotating an
electric dipole from stable equilibrium position to unstable equilibrium.
4.25µC & 9 µC charges are separated by a distance of
100 cm .At what distance from 25μC the net electric field intensity will be
zero.
5. Derive an expression of
electric field intensity at axial point due to a dipole.
6. Derive an expression of
electric field intensity due to linear charge distribution of infinite long
wire using Gauss law.
7. An electric dipole with dipole moment 4x10-9C-m
is aligned at 300 with the direction of uniform electric field of
magnitude 5x104 NC-1 .Calculate the magnitude of the
torque acting on the dipole.
8. A particle of mass m and charge q is released from
rest in a uniform electric field E..Calculate the kinetic energy, it attains
after moving a distance S between the plates.
9. A polythene piece rubbed with wool is found to have a
negative charge of 3x10-7C.
(a)Estimate the number of electrons transferred (from
which to which)
(b)Is there a transfer of mass from wool to polythene?
10. A point charge of 2µC is at the center of a cubic Gaussian
surface 9 cm on edge. What is the net electric flux through the surface.
ANSWER KEY:
2 Marks questions
|
1
|
Correct
answer
|
|
2
|
 KQ2/l2 |
|
3
|
Correct
answer
|
|
4
|
Correct
answer
|
|
5
|
cxm
|
|
|
|
|
6
|
1012
|
|
7
|
Correct
answer
|
|
8
|
Correct
answer
|
|
9
|
1.92x107C
|
|
10
|
Correct
answer
|
3 Marks questions
|
1
|
Correct
answer
|
|
2
|
Correct
answer
|
|
3
|
W=2pE
|
|
4
|
62.5cm
|
|
5
|
Correct
answer
|
|
|
|
|
6
|
Correct
answer
|
|
7
|
10-4
Nm
|
|
8
|
qES
|
|
9
|
(a)1.87x1012
from wool to polythene
|
|
|
(b)Yes,
because of transfer of electrons
|
|
10
|
3.76x104
vxm
|
Sunday, April 12, 2020
Saturday, April 11, 2020
Friday, April 10, 2020
Thursday, April 9, 2020
Wednesday, April 8, 2020
2.Chapter 1 Electrostatics part 2
This video contains coulomb's law and principle of superposition
Class-XIl, Subject-Physics
Tuesday, April 7, 2020
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