CBSE > Class 11 > Physics | CBSE Board | Homework Help

In science stream, maths and physics are related to each other because they help us in engineering and biology and chemistry is related to each other because it helps in doctoring. You can see that you are right or wrong. I think you have choosed right option.????

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Pk . 5 years, 2 months ago

Definitely bro....?

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Is fundamental pq and supplementary pq dimensionless units

Posted by Prabhat Singh 5 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Anjali Anand 5 years, 2 months ago

Fundamental physical quantity have dimension& unit as well , supplementary quantity are dimensionless but have units

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Shabana Aijaz 5 years, 2 months ago

Yes ofcourse because it involves thetha which is demensionless

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Rajni Dwivedi 5 years, 2 months ago

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Explain the parallax method to measure distance between the earth and planet

Posted by Riya Nirala 5 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 5 years, 2 months ago

Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines. Distance between the two viewpoints is called Basis.

Measuring distance of a planet using parallax method

Similarly, α = d/D

Whereα = angular size of the planet (angle subtended by d at earth) and d is the diameter of the planet.αis angle between the direction of the telescope when two diametrically opposite points of the planet are viewed.

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Is there any easy way to u understand physics? ????

Posted by Prateek .. 5 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Prateek .. 5 years, 2 months ago

Really?? U r discouraging me.?

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Mohit Nayma 5 years, 2 months ago

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Some most important mathematical tools related to Physics

Posted by Prateek .. 5 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

How to learn product of vectors I wanna understand. But I can't. It's very difficult .

Posted by Prateek .. 5 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Differentiate between distance and displacement

Posted by Akshat Verma 5 years, 2 months ago

CBSE > Class 11 > Physics

4 answers

Hiteswari Gadtia 5 years, 2 months ago

Displacement is the shortest path between final and initial point

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Hiteswari Gadtia 5 years, 2 months ago

Distance: it is the actual path travelled by the body during course of motion * sI unit is metre Dimension [m°L1T°]

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Gaurav Seth 5 years, 2 months ago

Distance

Displacement

1. It is the length of path traversed by the object in a certain time.

2. It is a scalar quantity that is it has only the magnitude.

3. It depends on the path followed by the object.

4. It is always positive.

5. It can be more than or equal to the magnitude of displacement

It is the distance traveled by the object in a specified direction in a certain time (that is the distance between the final and initial positions).

It is a vector quantity that is it has both the magnitude and direction.

It does not depend on the path followed by the object.

It can be positive, negative and even zero.

Its magnitude can be less than or equal to the distance

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Anjani Pandey 5 years, 2 months ago

Short length is known as distance while longer one is known as displacement

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What is classical physics?

Posted by Priyanshu Kumar ????? 5 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

Pooja ** 5 years, 2 months ago

Classical physics is ancient physics in which we study macroscopic particles such as thermodynamics, magnetism, electricity etc.

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Pk . 5 years, 2 months ago

The physic of nineteenth century or past is considered as classical physics

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Prateek .. 5 years, 2 months ago

U know how to understand product of vectors . It's very difficult for me. Please help.

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Prateek .. 5 years, 2 months ago

Hope u understand

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Prateek .. 5 years, 2 months ago

It refers to theories of physics that predate modern.more complete more widely applicable theories.

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Can anyone give me a notes Of CH 4 in physics

Posted by Sahil Malik 5 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Pooja ** 5 years, 2 months ago

I have notes but I cannot write them and copy paste them here. Sorry

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Prateek .. 5 years, 2 months ago

I am not understanding physics. Dont know . Why????

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Prateek .. 5 years, 2 months ago

Same here

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What is physically fitness?? good morning everyone☺️☺️☺️

Posted by Kha Gay Mella Sara Purana Yaall ☹️??? 5 years, 2 months ago

CBSE > Class 11 > Physics

4 answers

Divyanshi Goswami 5 years, 2 months ago

Plz can u tell me that what is the meaning of. Vgm??????

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Sahil Malik 5 years, 2 months ago

vgm yaar Purana ????????

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Usha Goswami 5 years, 2 months ago

This is your answer ?

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Usha Goswami 5 years, 2 months ago

Physical fitness is to the human body what fine tuning is to an engine. It enables us to perform up to our potential. Fitness can be described as a condition that helps us look, feel and do our best. ● Physical fitness involves the performance of the heart and lungs, and the muscles of the body.

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ANSWER

Covid 19 is which type of virus?

Posted by Chehak .. 5 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Sahil Malik 5 years, 2 months ago

Coronaviruses are a large family of viruses that are known to cause illness ranging from the common cold to more severe diseases such as Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS).

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Chapter 13 table 13.1 solution

Posted by Creative Garvit 5 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Aarohi Singh 5 years, 2 months ago

Which subject

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ANSWER

Law of attraction...

Posted by Chehak .. 5 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Prateek .. 5 years, 2 months ago

Hope u understand.

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Prateek .. 5 years, 2 months ago

It is the belief that positive and negative thoughts bring positive and negative experiences into a person's life.

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What is quantum theory ???

Posted by Kha Gay Mella Sara Purana Yaall ☹️??? 5 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

Chehak .. 5 years, 2 months ago

describes physical properties of nature on an atomic scale..... Welcome bro ?

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Ankit Singh Thakur???? 5 years, 2 months ago

Welcome yar purana

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Kha Gay Mella Sara Purana Yaall ☹️??? 5 years, 2 months ago

Thanks bro ??

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Ankit Singh Thakur???? 5 years, 2 months ago

This your answer Yaar purana

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Ankit Singh Thakur???? 5 years, 2 months ago

Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model and matrix mechanics), part of quantum field theory, is a fundamental theory in physics. It describes physical properties of nature on an atomic scale.

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2nd law of motion... Derivation?

Posted by Chehak .. 5 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

Ankit Singh Thakur???? 5 years, 2 months ago

Welcome sister

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Chehak .. 5 years, 2 months ago

No need for sorry... Vaise i know u

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Chehak .. 5 years, 2 months ago

Thnx..ankit

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Ankit Singh Thakur???? 5 years, 2 months ago

Oh sorry ananya sharma this is your answer

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Ankit Singh Thakur???? 5 years, 2 months ago

This statement is expressed in equation form as, a=Fnetm The above equation can be rearranged to a familiar form as F=ma Since force is a vector, Newton’s second law can be written as F⃗ =ma⃗ The equation shows that the direction of the total acceleration vector points in the same direction as the net force vector. Deriving Newton’s Second Law Force is equal to the rate of change of momentum For Changing Mass Let us assume that we have a car at a point (0) defined by location X0 and time t0. The car has a mass m0 and travels with a velocity v0. After being subjected to a force F, the car moves to point 1 which is defined by location X1 and time t1. The mass and velocity of the car change during the travel to values m1 and v1. Newton’s second law helps us determine the new values of m1 and v1 if we know the value of the acting force. Taking the difference between point 1 and point 0, we get an equation for the force acting on the car as follows: F=m1v1−m0v0t1−t0 Let us assume the mass to be constant. This assumption is good for a car because the only change in mass would be the fuel burned between point “1” and point “0”. The weight of the fuel is probably small relative to the weight of the rest of the car, especially if we only look at small changes in time. Meanwhile, if we were discussing the flight of a bottle rocket, then the mass does not remain constant and we can only look at changes in momentum. For Constant Mass For a constant mass, Newton’s second law can be equated as follows: F=mv1−v0t1−t0 We know that acceleration is defined as the change in velocity divided by the change in time. The second law then reduces to a more familiar form as follows: F=ma The above equation tells us that an object will accelerate if it is subjected to an external force and the amount of force is directly proportional to the acceleration and inversely proportional to the mass of the object. What is a Net Force? A net force ΣF is the sum of all forces acting on a body. More precisely, it is the vector sum of all forces acting on a body. Calculating the net force acting on a horse Consider two forces of magnitude 30 N and 20 N that is exerted to the right and left respectively on the horse shown in the picture. If we assume the rightward direction as positive, then the net force on the horse can be calculated as follows: ∑F=30N−20N=10N ∑F=10Ntotheright

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ANSWER

Quantum number?

Posted by Chehak .. 5 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

Chehak .. 5 years, 2 months ago

Ananya yadav? I m not ananya yadav... I m ananya sharma

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Ankit Singh Thakur???? 5 years, 2 months ago

Welcome sister

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Chehak .. 5 years, 2 months ago

Thnx ankit

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Ankit Singh Thakur???? 5 years, 2 months ago

This your answer ananya yadav

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Ankit Singh Thakur???? 5 years, 2 months ago

a number which occurs in the theoretical expression for the value of some quantized property of a subatomic particle, atom, or molecule and can only have certain integral or half-integral values.

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how,a vector quantity can be represented graphically?

Posted by Sahil Malik 5 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Sahil Malik 5 years, 2 months ago

I am gud ND you

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Chehak .. 5 years, 2 months ago

Vectors can be represented graphically as arrows. The length of the arrow indicates the magnitude of the vector. The direction of the arrow indicates the direction of the vector. ... When two vector quantities are added, the two arrows that represent the quantities are joined tip-to-tail.

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Chehak .. 5 years, 2 months ago

Hi... Kaise ho sona... Snehil kaisa h

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A body moving with uniform acceleration describes 20m in 2nd and 30 m in 4th second of its motion . Calculate the distance moved by its 6 second

Posted by Surbhi Suman 5 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 5 years, 2 months ago

Given,

distance covered in 2nd s = 20 m

distance covered in 4th s = 30 m

We know,

Snth = u + a(2n - 1)/2

=> S2nd = u + a(2*2 - 1)

=> 20 = u+ 3a/2

=>20 = (2u+3a)/2

=>40 = 2u + 3a ------------- (1)

Again,

S4th = u + a(2*4 -1)/2

=>30 = u + 7a/2

=>30 = (2u + 7a)/2

=>60 = 2u + 7a --------------(2)

(1) - (2)

=>2u + 3a -2u -7a = 40 - 60

=> -4a = -20

=>a = 5

Putting the value of a in eq (1), we get,

=>2u + 3(5) = 40

=>2u = 40 -15

=>u = 25/2

Now,

S6th = u+ a(2n -1)

=>S6th = 25/2 + 5(2*6 -1)/2

=>S6th = 25/2 + 5*11/2

=>S6th = 25/2 + 55/2

=>S6th = 80/2

=>S6th = 40

Hence , distance covered in the 6th s = 40 m

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ANSWER

Two resistance r1=200+–4ohm and r2=+—3ohm are connected in series find the equivalent resistance

Posted by Shivam Dwivedi 5 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

definitions polar vector and Axial vector

Posted by Sahil Malik 5 years, 2 months ago

CBSE > Class 11 > Physics

5 answers

Usha Goswami 5 years, 2 months ago

Polar vector A vector quantities whose direction is along the direction of the motion of a body or particle is known as polar vector E.g: displacement, velocity etc Axial vector A vector quantities whose direction is along the direction of rotation of the body or particle E g: angular acceleration,torque etc

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Sahil Malik 5 years, 2 months ago

Only 3 marks

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Chehak .. 5 years, 2 months ago

Kitine marks acc. ?

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Sahil Malik 5 years, 2 months ago

سهل

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Sahil Malik 5 years, 2 months ago

can anyone's give me a easy definitions

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explain the additions of two collinear vector. Also define resultant vector?

Posted by Sahil Malik 5 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

how, a vector quantity can be represented graphically ?

Posted by Sahil Malik 5 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

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define unit work. write the absolute unit of work in in (i) CGS system and (ii) SI system. show that 1 joule is equal to 10 raise to power 7erg.

Posted by Sahil Malik 5 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Meghna Thapar 5 years, 2 months ago

The SI unit of work is the joule (J), which is defined as the work expended by a force of one newton through a displacement of one metre. Absolute units: (i) SI System - Joule is the unit of work in SI system. ... (ii) CGS system – CGS unit of work is erg. Work done is said to be 1 erg if a force of one dyne displaces the body by 1 cm in the direction of force applied.

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the Bomb thrown in a horizontal direction with a velocity of 50 metre per second it explodes into two parts of masses 6 kg and 3kg the heavier fragment continue to move in the horizontal direction with a velocity of 40 metre per second calculate the velocity of the lighter fragment ? how can we solve ......Is answer .....70m/s.

Posted by Sahil Malik 5 years, 2 months ago

CBSE > Class 11 > Physics