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Lesson Posted on 13 Apr Tuition/Class 11 Tuition

Class 11 biology

Khyati Pandya

Experienced and motivational biology professor and lecturer studied in an array of Botany. Educator that...

https://youtu.be/WdCRrcfan44
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Lesson Posted on 31 Mar CBSE/Class 11 Tuition/Class 11 Tuition

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Bikash Chandra

I am an experienced, qualified teacher and tutor with over 2 years of experience in teaching Maths across...

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Lesson Posted on 10 Jan Tuition/Class 11 Tuition

Work sheet for class 11 (biology)

Sneha B.

I am a student pursuing BSc.Honours degree from Vidyasagar College For Womens under Calcutta University....

CELL - THE BASIC UNIT OF LIFE 1. Which of the following statement is not correct? a) Lysosomes are formed by the process of packaging in the endoplasmic reticulum. b) Lysosomes have numerous hydrolytic enzymes. c) Lysosomes are membrane-bound structure. d) The hydrolytic enzymes of... read more

             CELL - THE BASIC UNIT OF LIFE

1.  Which of the following statement is not correct?

a) Lysosomes are formed by the process of packaging in the endoplasmic reticulum.

b) Lysosomes have numerous hydrolytic enzymes.

c) Lysosomes are membrane-bound structure.

d) The hydrolytic enzymes of lysosome are active under acidic pH.

 

2.  The concept of "Omnis cellula -e - cellula" regarding cell division was first proposed by

a) Aristotle

b) Rudolf Virchow

c) Theodore Schwann 

d) Schleiden.

 

3.  Which of the following events does not occur in rough endoplasmic reticulum?

a) protein folding 

b) protein glycosylation 

c) cleavage of the signal peptide 

d ) phospholipid synthesis

 

                             ------  X -------

 

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Lesson Posted on 27/11/2019 Tuition/Class 11 Tuition

Arthematic progression

Sheza R.

I am a University student. I'd helped my friends with their subject and I also younger students with...

A sequence is called an AP. If its terms continuously increase or decrease by the same number, this fixed number is called the common difference of the AP (d). Which can be positive or negative or zero. The first term of AP is denoted by 'a1', and the 2nd term is a2.....nth term is an. Finite AP An... read more

A sequence is called an AP. If its terms continuously increase or decrease by the same number, this fixed number is called the common difference of the AP (d). Which can be positive or negative or zero. The first term of AP is denoted by 'a1', and the 2nd term is a2.....nth term is an.

Finite AP

An AP with finite no. Of terms is called finite AP

Infinite AP

An AP with infinite no. Of terms is called infinite AP 

the nth term of an AP

an= a1+ (n-1)d

Eg: a10 = a1+(10-1)d

2,7,12...

a10=2+9×5

a10=47

 

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Lesson Posted on 07/11/2019 Tuition/Class 11 Tuition

Mechanics

Ravi Kumar Mumbai

I am an experienced and qualified professional with over 8 years of teaching experience in teaching physics...

INTRODUCTION Mechanics deals with the motion of various types of bodies, relations of forces, mechanical properties of bodies and matter, etc. Kinematics deals with the motion of particles and rigid bodies without accounting for the forces responsible for their motion. If the body is, however, of... read more
  1. INTRODUCTION

Mechanics deals with the motion of various types of bodies, relations of forces, mechanical properties of bodies and matter, etc. Kinematics deals with the motion of particles and rigid bodies without accounting for the forces responsible for their motion. If the body is, however, of small size such that its motion can be described by a point mass moving along a straight line, such a motion is called rectilinear motion or motion in one dimension.

  1. MOTION

When the body changes position w.r.t. observer, the body is said to be in motion. If the body doesn’t change position then it is said to be at rest w.r.t. observer. For example, if two passengers are traveling in a moving train they are at rest w.r.t. each other while they are in motion w.r.t. an observer standing on the ground.

  1. A PARTICLE

particle is the physical analog of a point. A body of finite size may be considered as a particle only if all parts of the body undergo the same displacement and have the same velocity and acceleration. Thus, for a particle-like body, its motion can be described by studying the motion of any point on the body

 

  1. DISTANCE AND DISPLACEMENT

As a particle moves in space with respect to the time it follows a curve or a straight line, which is called its path or trajectory. Distance is the actual length covered along the path, while displacement is the difference between the final and initial positions of the particle. The position of a particle is given by a position vector drawn from the origin to the particle.

The figure illustrates the difference between distance and displacement. The curve length AB is called the

 

distance; the vector rAB = rB – rA is called the displacement.

  • Distance is a scalar; displacement is
  • The magnitude of displacement is always less than or equal to
  • For a moving body, displacement can be zero but distance

cannot be zero.

 

For a body moving in a straight line from point Ato point B along x-axis such that its initial and final position is at a distance xi and xf respectively, the minimum distance between final and initial position is

called displacement, D . x

 

 

AB = Dx = x – x .

 

O                           A             B                                 X

xi                      Dx

 

f          i                                                                                                                        xf

Displacement is avector frominitialpositionto finalposition. If the pathofthebodyisnot along astraight

line, the total length of the actualpath covered by the body is called the distance covered by thebody and is a scalar quantity. Thedisplacement is independent ofthe actualpathcovered by the body.

 

5.  AVERAGE SPEED AND AVERAGE VELOCITY

The average speed in a time interval is defined as the total distance travelled by the particle divided by the time interval.

 
   


Total distance travelled

Average speed =       Total time taken

The average velocity is defined as

displacement

vav    =   time elapsed

 

 

or         v    =

 

rB - rA = ΔrAB

              

 

t B - t A              Δt

  • Average speed is a scalar quantity; average velocity is a vector Both are expressed in ms–1or kmh–1.
  • Average velocity can be zero but average speed cannot be
  • The magnitude of average velocity is always less than or equal to the average

|vav| £ v

 

or                              £

 

distance time elapsed

 

thus        |displacement| £ distance

  • Average speed does not mean the magnitude of the average velocity

 

Consider a body moving on the straight line having the initial position A at time ti at a distance xi from the

origin. It travels a distance x1 to reach B and after travels a distance x2 from B to C reaching at time tf. C is the final position is at a distance xf from the origin. The average speed will be equal to ratio of total

 
   


distance covered to the total time.                        x

\ Average speed = x1 + x2

t f - ti

 

A                         B

 

 

Average velocity =

 

x f - xi t f - ti

 

O      xi

 

x f                                        X

2

 

C x

 

  1. INSTANTANEOUS SPEED AND INSTANTANEOUS VELOCITY The instantaneous speed and velocity are the respective average speed and velocityfor the infinitesimally small time interval (e. Dt ® 0). Thus

 

Instantaneous speed v =

 

lim

 

Dr dr

 

 

Dt ®0 Dt     dt

 

 

instantaneous velocity v =

 

lim

 

Dr dr

                 

 

Dt ® 0 Dt dt

  • As the time interval tends to zero (Dt ® 0), the displacement vector Dr approaches a limiting direction which is tangential to the path of the particle at that Thus, the instantaneous velocity direction is always tangential to the path followed by the particle.
  • The instantaneous speed is equal to the magnitude of the instantaneous
  • Aparticle may have constant speed but variable

 

  • For a particle moving with constant velocity, its average velocity and instantaneous velocity are always

Instantaneous velocityof a particlemoving on a straight line say along x-axis is given as

 

v(t)

 

lim      D x

 

=   D t ® 0 D t

 

lim v .

=                        av

 

D t ® 0

 

The instantaneous velocity v(t) is the derivative of displacement with respect to time.

 

v (t) =

 

 d [r(t)] dt

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Lesson Posted on 07/11/2019 Tuition/Class 11 Tuition

CIRCULAR MOTION

Ravi Kumar Mumbai

I am an experienced and qualified professional with over 8 years of teaching experience in teaching physics...

If a particle moves in such a way that its distance from a fixed point remains constant to the path will be circular and its motion is called circular motion. If we whirl a stone tied with a string at one end its motion is circular motion. The motion of the electron around the nucleus is treated as a... read more

If a particle moves in such a way that its distance from a fixed point remains constant to the path will be circular and its motion is called circular motion. If we whirl a stone tied with a string at one end its motion is circular motion. The motion of the electron around the nucleus is treated as a circular motion. Motion of earth around the sun is treated as a circular for some gravitational study.

Read More... Circular Motion

 

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Lesson Posted on 11/09/2019 CBSE/Class 11 Tuition/Class 11 Tuition

How pass a Journal Entry-Class 11, Book-Keeping and Accountancy

Rajiv Vadera

I am MBA Finance. I believe in conceptual learning and not just theoretical

Transaction - Started Business with Cash
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Lesson Posted on 03/09/2019 Tuition/Class 11 Tuition

History - Causes of the fall of the Mughal Empire

Lourembam Devraj Singh

I am an alumnus of Ramakrishna Mission Vidyalaya Narendrapur and a BE Graduate in Mechanical Engineering...

Introduction:-Babur laid down the foundation stone of the mighty Mughal Empire by defeating Ibrahim Lodi (Lodi Dynasty of the then Delhi Sultanate) in the First Battle of Panipat (1526). The Mughal Empire has reserved an important space in Indian history in the field of art and culture until its downfall... read more

Introduction:-
Babur laid down the foundation stone of the mighty Mughal Empire by defeating Ibrahim Lodi (Lodi Dynasty of the then Delhi Sultanate) in the First Battle of Panipat (1526). The Mughal Empire has reserved an important space in Indian history in the field of art and culture until its downfall after the death of Aurangzeb. Some of the important reasons contributing towards the downfall of the mighty empire are as follows-
1) Vastness of the Empire
The Mughal emperors followed expansionist policy, and the vastness of the empire was so immense that it was not possible to administer properly from the capital at Delhi. As such, misgovernance arose in the outskirt provinces due to which the provinces broke down into independent kingdoms under the leadership of local governors. Thus, the disintegration of the territory started igniting the spark for the Mughal downfall.
2) Deccan Policy of Aurangzeb
Aurangzeb was an imperialist and he was keen towards the annexation of Deccan kingdoms of the Golconda and the Bijapur. He was defeated during the action of his annexation of the two kingdoms. This is one of the immediate causes behind the downfall of the Mughal Empire.
3) Religious Policy of Aurangzeb
Aurangzeb did not respect other religions except Islam. He forced to convert all the non-Islamic people into Islam and indulged himself in the destruction of many Hindu temples and shrines, which ultimately hurt the religious sentiment of the Hindu people. It resulted in a massive protest and agitation of the people against him.
4) Land Grant System (Zagirdari System)
The officials of the empire and the military chiefs or Mansabdars were paid their salaries in Zagirs or lands. This enabled the Jagirdars to collect land revenues from the people, which ultimately resulted in autonomy in the hands of the Jagirdars.
5) Weak Successors of the emperors
The successors after Aurangzeb were weak as compared to the predecessor emperors. As a result, the local governors and the military chiefs took advantages out of it to start the autonomous government in their administered territories.
6) The arrival of the European traders
The Portuguese were the first to arrive in India. However, James Hawkins was sent to the court of Jahangir by the king of England, James I for trade concessions. However, it was not permitted. It was followed by Thomas Roe who finally acquired the trade concessions from the Mughal Emperor Shah Jahan. Since then, the trading ambition of the East India Company got converted into the power politics, thereby kickstarting its imperialism in the soil of India.
Thus, the Mughal Empire, which was once mighty in the sense of its expansion and rich culture, disintegrated on account of the above reasons.

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Answered on 18/09/2019 Tuition/BSc Tuition/BSc Zoology Tuition/Class 11 Tuition

Mohammed Asalath Ali Khan

The perfect tutor with 5 years of experience in home tution

DNA polymerase enzyme
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Answered on 18/07/2019 Tuition/Class 11 Tuition

Anisha C.

Biotech professional in NITZA BIOLOGICALS but still pursuing

Mitochondria is the double membrane-bound organelle found in most eukaryotic organisms. The synthesis of ATP takes place there. Mitochondria generates most of the cell's supply of ATP which is used as a source of chemical energy. Thus, mitochondria are termed as the Powerhouse of Cell.
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