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

The decrease in the force of attraction exerted by the nucleus on the valency electrons due to the presence of electrons in the inner shells, is called the screening effect or shielding effect

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An object moving in a straight line moves from A to B with the speed of 40km/hr and return back from B to A with a speed of 60km/hr. Calculate yhr average speed and average velocity during the whole motion

Posted by Vanshita Pundir 7 years, 5 months ago

CBSE > Class 11 > Physics

4 answers

Avantika Sharma 7 years, 5 months ago

Average velocity will be 0.

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Tanvi Dahiya 7 years, 5 months ago

48m/s

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Riti Bansal 7 years, 5 months ago

48 m/s

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Gaurav Tiwari 7 years, 5 months ago

48m/s

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If x = a+bt×t , a =8.5m , b =2.5m/secondsquare and t is measured in seconds what is its velocity at t=0s and t =2s??

Posted by Unknown S 7 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Gaurav Tiwari 7 years, 5 months ago

At t=0 velocity is 0 ,and at t=2 velocityis9.25

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What is parsec

Posted by Garvit Mittal 7 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Unknown S 7 years, 5 months ago

Paesec is the distance at which average radius of earth's orbit subtends an angle of 1 arc second

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What is parallax and it's value

Posted by Garvit Mittal 7 years, 5 months ago

CBSE > Class 11 > Physics

2 answers

Riti Bansal 7 years, 5 months ago

Parllax is appernat shift possition of eye with respect to other ex when we close our left eye and saw with right eye to an object after right eye it contain two possition called parallax method

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Yash Rastogi 7 years, 5 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. The currently accepted value of solar parallax is 8".794 143.

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Hiiii

Posted by Ritik Chauhan 7 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Archita Bhattacharjee 7 years, 5 months ago

U .... Don't post such q. .. got it ?

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Rest and motion are relative terms

Posted by Lokesh Lokesh 7 years, 5 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Derive by the method 0f dimensions an expression for iscope velocity of the body assuming that with depends Of radius of the planner and acceleration due to gravity

Posted by Lalit Rajput 7 years, 5 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Explain 1ampeare

Posted by Golu Chaudhary 7 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Ritu Thapliyal 7 years, 5 months ago

One ampere is defined as current flow with electric charge of one coulomb per second

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Hii there i am tonu and i am a speed cuber ..

Posted by Tonu Tj 7 years, 5 months ago

CBSE > Class 11 > Physics

2 answers

Tonu Tj 7 years, 5 months ago

https://youtu.be/_f0pyJuwhB4

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Prabhat Emmanuel 7 years, 5 months ago

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What is four of motion

Posted by Yogesh Sharma 7 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Mr. Thakur 7 years, 5 months ago

Are you ask four types of motions?

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Write the dimensions of 'a×b' in the relation E=b-x²/at

Posted by G.K Prasanth 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Anmol Yadav 7 years, 5 months ago

Is t stand for time?? and x for position??

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ANSWER

4.21

Posted by Me Hamlik 7 years, 5 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What are changes that CBSE had done syllabus of 11th physics

Posted by Ritesh Kumar Sinha 7 years, 5 months ago

CBSE > Class 11 > Physics

2 answers

Vivek Modak 7 years, 5 months ago

CBSE included optics in phy

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Ayush Anand 7 years, 5 months ago

Optics had been added in syllabus only

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ANSWER

Show that angular momentum has the same physical unit as Planck's constant h which is given by relation, E=hv

Posted by Singh Is King 7 years, 5 months ago

CBSE > Class 11 > Physics

2 answers

Singh Is King 7 years, 5 months ago

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Singh Is King 7 years, 5 months ago

...

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Two vectors A and B are given below then find the projection on A vector and B vector if A vector = i^ + k^ - 2 j^ and B vector = 3i^+6k^ - 8 j^

Posted by Divya Meena 7 years, 5 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is tension T

Posted by Shifa Hasmi 7 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Anmol Yadav 7 years, 5 months ago

Tension in one dimension. Tension in a string is a non-negative scalar quantity. Zero tension is slack. A string or rope is often idealized as one dimension, having length but being massless with zero cross section.

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What is scalar

Posted by Harsh Raj 7 years, 5 months ago

CBSE > Class 11 > Physics

3 answers

Shreya Soni 7 years, 5 months ago

Such physical quantity which have only magnitude but have no direction , is called Scalar

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K M 7 years, 5 months ago

Which have only magnitude but no direction

2Thank You

Simran Kalra 7 years, 5 months ago

Scalar is a word used for any quantity that possesses only magnitude

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State and prove mid point theorem by using vectors

Posted by Aastha Saxena 7 years, 5 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Two vector A and B forms a parallelogram if vector d1 and d2 are diagona, then write vector d1and d2 in term of vector A and B

Posted by Arjum Sharma 7 years, 5 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Displacement Vector in Space

Posted by Rahul Sharma 7 years, 5 months ago

CBSE > Class 11 > Physics

2 answers

Sujatha Vijay 7 years, 5 months ago

May be u can use some reference books as I got my answer for these there.

1Thank You

Sujatha Vijay 7 years, 5 months ago

In this case u r talking about vectors in 3-D which is to be thought only for IIT-JEE

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What is tensor

Posted by Navneet Mishra 7 years, 5 months ago

CBSE > Class 11 > Physics

3 answers

Jasprit Narayan 7 years, 5 months ago

These are those quantities which are neither vector nor scalar. Example- moment of inertia, stress,strain etc.

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Rahul Sharma 7 years, 5 months ago

A tensor is a quantity which do not obey Vector law but as well as obey scaler quantity rules

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Anshul Jaat 7 years, 5 months ago

a mathematical object analogous to but more general than a vector, represented by an array of components that are functions of the coordinates of a space.

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123 chapter

Posted by Shiv Shakti Singh 7 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Shreya Gour 7 years, 5 months ago

What...????

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5.74g of a substance occupies 1.2 cm^3 .express its density to correct significant figures

Posted by Chhatrapal Singh 7 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Nancy Rajput 7 years, 5 months ago

density=mass/volume mass=5.74g volume=1.2cm cube therefore, 5.74/1.2=4.7 (taking only 2 significant figures) rounding off =4.8g/cm cube

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What do you mean by 1 parsec?

Posted by Khushi Dubey 7 years, 5 months ago

CBSE > Class 11 > Physics

2 answers

Nancy Rajput 7 years, 5 months ago

Parsec is an astronomical unit of measurement which is commonly used in galactic or extragalactic scales. It is defined as the distance of an astronomical object from the Sun which has a parallax of 1 arcsecond.

1Thank You

Immortal Prince 7 years, 5 months ago

It is the largest unit of distance equals to 3.08 light year and defined as the distance when 1 second of angle is made by an arc of lenght one A.U .

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about vector

Posted by Mahi Bisht 7 years, 5 months ago

CBSE > Class 11 > Physics