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If Q charge are distributed over ring,disc,shell,conducting sphere and insulating sphere of radius r then find the charge densities of each

Posted by Arvind Kushwah 5 years, 4 months ago

CBSE > Class 12 > Physics

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An electric dipole having charges at 3 micrometer at distance 3mm apart. Find electric potential at distance of 0.6m from the centre of dipole at axial point

Posted by Rahul Rawat 5 years, 4 months ago

CBSE > Class 12 > Physics

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Topics include in electrostatic

Posted by Pradeep Ji 5 years, 4 months ago

CBSE > Class 12 > Physics

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A 10cm long ros carries a charge of 50 micro coulomb distributed uniformly along its length. Find the magnitude of the electric field at a point 10 cm feom both the ends of rod

Posted by Satyajeet Kumar 5 years, 4 months ago

CBSE > Class 12 > Physics

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Why current flow opposite the direction of electron

Posted by Bhaskar Tiwari 5 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Akanksha Thakur 5 years, 4 months ago

Because conventionally it is believed that the current flows from positive to negative direction of the battery.....(ie starts from the positive terminal). Hence as we know that the electrons are attracted towards the positive sides....from here the scientists concluded that the direction of current is opposite to the direction of electrons. I hope you got a clear visual....=)

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Rohit Krishna 5 years, 4 months ago

It is an old convention to take direction of current to be opposite to the direction of electron,ie in the direction of proton....But the actual fact is that the direction of current is actually in the direction of flow of electrons...

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If current of 2 ampere is flowing through a circular loop of variation 2 centimetre then what is the magnitude of magnetic field at the centre of magnitude

Posted by Ayushi Saryam 5 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 5 months ago

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When we find out the electric field due to dipole in equatorial plane, then we derive the formula by considering which triangle either equilateral, scalene or isosceles triangle? And this formula is applicable for all the triangles?

Posted by Bhavya Jain 5 years, 4 months ago

CBSE > Class 12 > Physics

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What is the speed of light ?

Posted by Anand Yoduvanshi 5 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Avinash Shukla 5 years, 4 months ago

Speed of Light=3x10 ki power8 ms-l

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Rohit Krishna 5 years, 4 months ago

Speed of light in vacuum is approximately 3*10^8 m/s.The actual value in vacuum is 2.99792458*10^8 m/s.

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Difference between ac and dc.

Posted by Rohit Krishna 5 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 5 years, 4 months ago

<th> <center>Alternating Current</center> </th> <th> <center>Direct Current</center> </th>

AC can carry and safe to transfer longer distance even between two cities, and maintain the electric power.	DC cannot travel for a very long distance. It does, it loses electric power.
The rotating magnets cause the change in direction of electric flow.	The steady magnetism makes DC flow in a single direction.
The frequency of AC is depended upon the country. But, generally, the frequency is 50Hz or 60Hz.	DC has no frequency of zero frequency.
In AC the flow of current changes its direction backwards periodically.	It flows in a single direction steadily.
Electrons in AC keep changing its directions – backward and forward	Electrons only move in one direction – that is forward.

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Apply guess's theorem to find expression if electric field intensity at any point due to point charge

Posted by Swastik Thakur 5 years, 4 months ago

CBSE > Class 12 > Physics

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Important numericals of chapter

Posted by Veerdeep Kaur 5 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Avinash Shukla 5 years, 4 months ago

Which chapter

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Rohit Krishna 5 years, 4 months ago

Which chapter?

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If we are asked in paper to prove coulumb law .so what we will prove coulumbs law or permittivity

Posted by Rohit Joshi 5 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Avinash Shukla 5 years, 4 months ago

we have to prove Coulombs law Kq1q2/r square

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Gaurav Bagga 5 years, 4 months ago

Coulombs law

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Columb's law

Posted by Prince Nagar 5 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Gaurav Seth 5 years, 4 months ago

Coulomb’s Law

Coulomb’s law states that Force exerted between two point charges:

Is inversely proportional to square of the distance between these charges and
Is directly proportional to product of magnitude of the two charges
Acts along the line joining the two point charges.

Here ε₀ = 8.854 x 10^-12 C² N^-1 m^-2is called permittivityof free space.

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Raghav Yadav 5 years, 4 months ago

f=1/4^€o q1 q2 /rsquare

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Raghav Yadav 5 years, 4 months ago

it states that the force of aatraction or repulsion between the 2 point charges is ditectly proportional to the product of magnitude of charge and inversely proportional to the square of the distance between them

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what are quarks

Posted by Raghav Yadav 5 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Ayush Vishwakarma 5 years, 4 months ago

Quarks are the sub atomic particle of proton,nuetron and electron.

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Differentiate grand wave propagation

Posted by Hashim Hilal 5 years, 4 months ago

CBSE > Class 12 > Physics

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A particle of mass m and charge q is released form rest in a uniform electric field of intensity E. Calculate the kinetic energy it attains after moving a distances between the plates ?

Posted by Kumar Jatt 5 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Kumar Jatt 5 years, 4 months ago

Answer plz

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The optical fibre is 2 metre long and has the diameter of 2 micrometre if a Ray of light is incident on one end of the fibre at an angle theta 1 equal to 40 The no. of reflections it makes before emerging from the other end is close to ?

Posted by Ayushman Bhargav 5 years, 4 months ago

CBSE > Class 12 > Physics

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What happens to two like charges placed in gravity free space?

Posted by Rohit Krishna 5 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Avinash Shukla 5 years, 4 months ago

Kike charges repel each other , no matter where they are

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Diksha Choudhary 5 years, 4 months ago

There is no any force exert because electrostatic force depends on medium☺️☺️☺️☺️

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Anshu Prajapati 5 years, 4 months ago

There is no any force exert because elcetrostatic force depends on medium

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What happens when we rubeed a glass rod with wool

Posted by Prakash Pant 5 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Avinash Shukla 5 years, 4 months ago

Transfer of charges takes place

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Rohit Krishna 5 years, 4 months ago

When we rub a glass rod with a wool,the glass rod(which has affinity for positive charge) loses electrons and becomes positively charged.The wool(which has affinity for negative charge) acquires those electrons and becomes negatively charged.

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The resistance of a conductor is 6ohm at 50 degree celcius and 7 ohm at 100 degree Celsius cal. The mean temp. Coffecient of resistence of the material

Posted by Gotav Bro 5 years, 4 months ago

CBSE > Class 12 > Physics

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Charge in one electron

Posted by Sagar Biswas 5 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Avinash Shukla 5 years, 4 months ago

1.6× 10 ki power 19

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Diksha Choudhary 5 years, 4 months ago

-1.6*10^-19 C = chage of an electron

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Rohit Krishna 5 years, 4 months ago

-1.6*10^-19C= charge of one electron

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Which is the best YouTube channel for physics??

Posted by Richa Raunak 5 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Riya Rana 5 years, 4 months ago

Unacademy

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Rohit Krishna 5 years, 4 months ago

Examfear(ncert based),doubtnut,unacademy

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A good book for physics with all Concepts and easy to study Self guide

Posted by Eshan Joshi 5 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

Avinash Shukla 5 years, 4 months ago

Only ncert

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? ? 5 years, 4 months ago

Go for sl arora.....you have to clear your concepts first and after that you can read ncert....i wont recommend you to study ncert first in physics....bio and chem ncert is enough but in phy the ncert has mixed up concepts so in order to have a better grip for a chapter read it from a guide first...and then ncert will polish your reasoning ability

3Thank You

Rohit Krishna 5 years, 4 months ago

NCERT is the only way to understand basics of physics,but it is a little hard to digest.If you read it carefully with your highest concentration,you will understand it and hence, physics.

1Thank You

Richa Raunak 5 years, 4 months ago

Only NCERT?

2Thank You

Eshan Joshi 5 years, 4 months ago

Please fast

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What is adsorption?

Posted by Paras Chauhan 5 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Paras Chauhan 5 years, 4 months ago

Thanku

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Yogita Ingle 5 years, 4 months ago

Adsorption is a process which involves the accumulation of a substance in molecular species in higher concentration on the surface. If we look at Hydrogen, Nitrogen and Oxygen, these gases adsorb on activated charcoal. Meanwhile, we have to note that adsorption is different from absorption. The two processes involve totally different mechanisms.

For the adsorption process, two components are required,

Adsorbate: Substance which is deposited on the surface of another substance. For example, H2, N2 and O2 gases.
Adsorbent: Surface of a substance on which adsorbate adsorbs. For example, Charcoal, Silica gel, Alumina.

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Rohit Krishna 5 years, 4 months ago

The accumulation of molecular species at the surface rather than in the bulk of solid or liquid is termed as adsorption.

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How can you charge a metal sphere positively without touching it.

Posted by Àĺķá Àñàmìķà 5 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Avinash Shukla 5 years, 4 months ago

Charging by induction

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Riya Rana 5 years, 4 months ago

By bringing a negatively charged rod near the metal sphere, through induction all the positive charge is collected near the rod, then the other side of the metal can be earthed to remove all the negative charge. Hence in the end we get a positively charged metallic sphere.

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Premraj Verma 5 years, 4 months ago

By induction; using negatively charged another sphere

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What is the potential

Posted by Gaurav Paul 5 years, 4 months ago

CBSE > Class 12 > Physics