CBSE > Class 12 > Physics | CBSE Board | Homework Help

Since average time (tau) between 2 collisions of electrons is inversely proportional to drift velocity and drift velocity is directly proportional to tau. Hence drift velocity is inversely proportional to temperature

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Mohammad Shazil 7 years ago

It decreases

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Rajat Dhull 7 years ago

It increase

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Write biotsavart law

Posted by Partham Bhardwaj 7 years ago

CBSE > Class 12 > Physics

3 answers

Shreya Bhardwaaj 6 years, 11 months ago

Helps to determine the intensity of magnetic field

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Vivek R 7 years ago

It explains the principle in which the magnetic field created due to a small element dl in a current carrying conductor •it is directly propotional to length dl •it is directly propotional to angle between them •it is directly propotional to current I •it is inversely propotional to square of R

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Shaista Siddiqui 7 years ago

This law deals with the magnetic field induction at a point due to small current element.

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Given syllabus is fix or not

Posted by Pradeep Singh 7 years ago

CBSE > Class 12 > Physics

1 answers

Rohan Nigam 7 years ago

its fixed and for more confirmation go with cbse syllabus in this app of ur particular subject

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a cyclotron accelerating's protons has dees of 0.4 m radius and radio frequency supply of 12 megacycle/second at 5000 volt maximum value. calculate the magnitude of the required magnetic field and the velocity acquired by the protons.

Posted by Saumya Maurya 7 years ago

CBSE > Class 12 > Physics

1 answers

Anthony Mwaniki 5 years, 1 month ago

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How Lenzs law follows from principle of conservation of energy

Posted by Tarun Gulia 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Derivation of mutual induction

Posted by Tarun Gulia 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

State which of the two , the capictor or an inductor ,tends to become short when the v of the applied ac voltage has a very high value

Posted by Tarun Gulia 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Derive a relation for the energy stored in a capacitor

Posted by Isha Kumari 7 years ago

CBSE > Class 12 > Physics

1 answers

Tarun Gulia 7 years ago

Energy stored in capicator, Let a capictor of capictance C be charged to potential V so, C=q\v or V = q\c small amount of work done by battery in charging the capictor to small charge dq at constant voltage V . dw=Vdq=q\cdq do its integartion puting limits 0 to q u will get 1\2 CV2

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From which sample paper all questions are come in board paper of class 12. Cbse

Posted by Harshit Pratap Singh 7 years ago

CBSE > Class 12 > Physics

1 answers

Tarun Gulia 7 years ago

Only do last 10 yrs queation paper heartly its enough

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Importance of ncert exemplar

Posted by Harshit Pratap Singh 7 years ago

CBSE > Class 12 > Physics

1 answers

Rohan Nigam 7 years ago

it has more questions related to ncert

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Electomotive force define

Posted by Sanya Tuli 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

How will you determine the magnetic field at a point is due to earth magnetic field or due to current carrying wire?

Posted by Sanjay Singh 7 years ago

CBSE > Class 12 > Physics

1 answers

Pranjal Kansal 7 years ago

I don't knoe

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What is the magnificatio

Posted by Muskan Singh 5 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Mark distribution of physics class XII ???

Posted by Mayank K. Mahour 7 years ago

CBSE > Class 12 > Physics

1 answers

Aditi Varshney 7 years ago

Mayank kindly see the bluprint?

1Thank You

ANSWER

Which topics are in board of unit 10 communication?

Posted by Rajat Dhull 7 years ago

CBSE > Class 12 > Physics

1 answers

Phuntsog Angmo 7 years ago

All

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ANSWER

Define Displacement Current.

Posted by Aryan Rai 7 years ago

CBSE > Class 12 > Physics

2 answers

Aryan Rai 7 years ago

@Yogita thanks

1Thank You

Yogita Ingle 7 years ago

In electromagnetism, displacement current is a quantity appearing in Maxwell's equations that is defined in terms of the rate of change of electric displacement field. Displacement current has the units of electric current density, and it has an associated magnetic field just as actual currents do. However it is not an electric current of moving charges, but a time-varying electric field.

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Capacitor as a filter circuit

Posted by Tanya Arora 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why M.F line not intersept each other ?

Posted by Sumit Kumar 7 years ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 7 years ago

The two magnetic field lines can never intersect each other because two tangents can be drawn from that point of intersection which will give two directions of the field from the same point,which is impossible.So, the two magnetic field lines can never intersect each other.

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Ots world derivation

Posted by Mohan Lal 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What id driftvelocity

Posted by Vivak Yadav 7 years ago

CBSE > Class 12 > Physics

1 answers

Shivangi Mukherjee 7 years ago

Velocity with which electrons are drifted towards the positive terminal when an external electric field is applied.

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ANSWER

Plzzz told how study the physics*?

Posted by Rakesh Yadav 7 years ago

CBSE > Class 12 > Physics

2 answers

Rakesh Yadav 6 years, 9 months ago

Tqq saumya?

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Saumya Agrawal 7 years ago

Practice derivation solve numericals and revise theory is the best way to study physics .. and also practice last 10 years question papers and all ncert solutions it really helps you a lot in studying physics☺☺

3Thank You

ANSWER

Which guide is best?

Posted by Rakesh Yadav 7 years ago

CBSE > Class 12 > Physics

1 answers

Aryan Rai 7 years ago

I think Oswaal. It was very much helpful for me in class 10 Boards especially with Bio which was my weakest and so I'm going with this also this time.

1Thank You

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What is sp3 sp2 sp3d2 hybridisation?

Posted by Shaista Siddiqui 7 years ago

CBSE > Class 12 > Physics

2 answers

Rohan Nigam 7 years ago

it refer to CFT AND VBT theory

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Amaan Khan 7 years ago

Refer chemistry ncert

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bsl application a incinity straight wire

Posted by Tushar Sharma 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is emw?

Posted by Deepak Bansal 7 years ago

CBSE > Class 12 > Physics

2 answers

Nitika Neb 7 years ago

Definition of electromagnetic wave. : one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

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Nitika Neb 7 years ago

Electro magnetic wave

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1st practical of class 12

Posted by Priyansee Sharma 7 years ago

CBSE > Class 12 > Physics

1 answers

Aryan Rai 7 years ago

Ohm's law

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What is magnetic flux? Describe it in easy words?

Posted by Saurav Kumar 7 years ago

CBSE > Class 12 > Physics

1 answers

Nitika Neb 7 years ago

Magnetic flux is a measurement of the total magnetic field which passes through a given area. It is a useful tool for helping describe the effects of the magnetic force on something occupying a given area.

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Expalin the principal working and theory of moving coil galvanometer

Posted by Aman Gupta 7 years ago

CBSE > Class 12 > Physics