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Application of eddy current

Posted by Yashvardhan Singh 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Premesh Tyagi 6 years, 6 months ago

Induction furnace magnetic braking electric power metre

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What is Flemming left hand rule

Posted by Kaliappan Sk 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 6 months ago

Fleming’s left hand rule states that stretch the forefinger, the central finger and the thumb of your left hand mutually perpendicular to each other. If the forefinger shows the direction of the magnetic field and central finger that of the current, then the thumb will point towards the direction of motion of the conductor.

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Working of cycloton

Posted by Rishabh Tripathi 6 years, 6 months ago

CBSE > Class 12 > Physics

2 answers

Premesh Tyagi 6 years, 6 months ago

When a charged particle is placed between the two days then both electric force and magnetic force act on it the charged particle increasing its speed due to electric force and magnetic force is responsible for circular motion the velocity of charged particle only increase in when it is present between the Dees magnetic force behaviour centripetal force

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? Natasha Yadav? 6 years, 6 months ago

If you have to understand then, refer to YouTube, animation will help you to understand better.

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a hundred volt charger charge the battery of 10 Cells of EMF 2 volt and internal resistance 0.1 ohm the charging circuit has a resistor in series with the battery if the resistance of the resistor is 10 ohm and supply current of 5 ampere find (a)the energy of register and (b)energy stored in battery in 1 hour?

Posted by Rk Parmar 6 years, 6 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The plates of the capacitor have plate area A and area clamped in the laboratory. The dielectric slab is released from rest with a length a inside the capacitor. Neglecting any effect of friction or gravity, show that the slab will execute periodic motion and find it's time period.

Posted by Khushi Yadav 6 years, 6 months ago

CBSE > Class 12 > Physics

2 answers

Khushi Yadav 6 years, 6 months ago

Question is from H C Verma Volume 2 Chapter 31 . It's not incorrect.?

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Zzz Zzzz 6 years, 6 months ago

Wrong question

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What is biots and savarts law?

Posted by Shikha Das 6 years, 6 months ago

CBSE > Class 12 > Physics

3 answers

Premesh Tyagi 6 years, 6 months ago

It is stated that the magnetic field give to a current carrying element is directly proportional to the length directly proportional to the sin theta and inversely proportional to the square of distance

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Poppin Edge 6 years, 6 months ago

This law is used to find the magnetic field nearer to any current carrying conducter

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Ďãřşháñăã Yadav ? ? ? 6 years, 6 months ago

Acc to this law, the magnetic field due to current carrying element dl carrying current I is driven by dB= μο/4π. Idlsinθ/r².

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When will sample paper 2019-20 will come..??

Posted by Mayank Choubey 6 years, 6 months ago

CBSE > Class 12 > Physics

2 answers

Mayank Choubey 6 years, 6 months ago

Nii aaya bhai

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A D 6 years, 6 months ago

Tin din ke andar

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Explain about moving coil galvanometer in deail

Posted by Adnan Khan 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Ďãřşháñăã Yadav ? ? ? 6 years, 6 months ago

It is a device which is used to detect small values of current. principle ➡️It is based on the fact that a current carrying coil experience a tourq when placed on external magnetic field. working and theory ➡️when a certain amount of current flows in a coil it will experience a tourq given by τ=nIABdinθ as magnetic field is radial so θ=90,, τ=nIAB. Due to rotation of coil a restoring tourq is produced in the elastic spring due to its elasticity so restoring torque is given by τ=kθ where θ is the twist produced in the spring and k is spring torsion constant. kθ=nIAB.... ➡️θ=nIAB/k.

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Why cyclotron is not considered to be suitable to accelerate electron ????

Posted by Amol Gùpta 6 years, 6 months ago

CBSE > Class 12 > Physics

4 answers

Aman Pratap 6 years, 6 months ago

Because it is very light so it gains very high velocity very quickly due to which its mass increases and frequency decreases and does not match with the oscillator frequency which may cause deacceleration of the electron.

1Thank You

Amol Gùpta 6 years, 6 months ago

Thanks to both of you

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Manika Gupta 6 years, 6 months ago

Since its mass is very less and it is -vely charged

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Mayank Choubey 6 years, 6 months ago

Since its mass is very less And cyclotrone is made to accelerate heavy particles like proton And in case of electron its speed will increase rapidly and increase in speed will increase its mass and when its speed will be equivalent to its mass it will come out of the spiral path.

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A conducting rod PQ,of length l,connected to a resistor R, is move at a uniform speed v, normal to a magnetic fiels B ,find it E and F

Posted by Naseem Taj 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Praveen Kumar 5 years, 4 months ago

doubt

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Plz give me ncert book link of 2019-2020

Posted by Sukhmanderdeep Singh 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Prabhat Emmanuel 6 years, 6 months ago

You can download from any educational website

2Thank You

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is cbsc student can reappear in 12th board again?

Posted by Nisha Singh 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Prabhat Emmanuel 6 years, 6 months ago

Yes

2Thank You

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If a =3i^-4j^and b =2i^+ 16j^ then find magnitude and directionof a+b

Posted by Ayesha Rahman 6 years, 6 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Value of electron

Posted by Vishal Yadav Yadav 6 years, 6 months ago

CBSE > Class 12 > Physics

2 answers

Premesh Tyagi 6 years, 6 months ago

Charge ya mass

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Khushi Yadav 6 years, 6 months ago

1.6×10^-19

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Process to distribution of current

Posted by Sjashi Kant 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 6 months ago

Electric power distribution is the final stage in the delivery of electric power; it carries electricity from the transmission system to individual consumers.

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1 Two identical conducting balls A and B have charges –Q and +3Q respectively. They are brought in contact with each other and then separated by a distance d apart. Find the nature of the Coulomb force between them.

Posted by Amit Kushwaha 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 6 years, 6 months ago

Once they are brought in contact with each other charge transfer take place between them in such a way that both the particles attain same charge, charge given by 3q will be equal to that gain by -q;

-q+x=3q-x;

x=2q;

the final charge on -q=q;

final charge on 3q=q;

As both are of the same charge and like forces repel each other and the nature of columb force of attraction will be repulsion.

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For the telescope separation exercise 25cm What is the separation batween the objective lens and the eye piece

Posted by Songachan Shimray 6 years, 6 months ago

CBSE > Class 12 > Physics

0 answers

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The electric strength of air is 2*10^7 N/C. The maximum charge that a metallic sphere of diameter 6mm can hold is?

Posted by A A 6 years, 6 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Chapter 3 example 3.8

Posted by Abhishek Yadav Students 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 6 months ago

Check solutions here : https://mycbseguide.com/ncert-solutions.html

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Why core of transformer is laminated?...?

Posted by Rahul_ Ry(ʘ‿ʘ) 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 6 months ago

The core is laminated to reduce these to a minimum as they interfere with the efficient transfer of energy from the primary coil to the secondary one. The eddy currents cause energy to be lost from the transformer as they heat up the core - meaning that electrical energy is being wasted as unwanted heat energy.

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A narrow beam of protons and duetrons,each having the same momentum, enters a region of uniform magnetic field directed of momentum. What would be the ratio of radii of the circular path described by them?

Posted by Medha Singh 6 years, 6 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Average power for LCR circuit

Posted by Jatin Dhaka 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Shatayu Ganvir 6 years, 6 months ago

EICos♀

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along charge density +lambda1 is surrounded by a hollow conducting up linear charge density -lambda2 use girls law to obtain expression for the electric field at a point in a space between cylinder and outside the large cylinder

Posted by Vikram Singh 6 years, 6 months ago

CBSE > Class 12 > Physics

2 answers

Priya Dharshini ? 6 years, 6 months ago

We can understand that..??

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Vikram Singh 6 years, 6 months ago

sorry use girls law type ho gya h uske jagah use Gauss law Girls law = Gauss law

2Thank You

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Mark two points in the electric field of -q and +q having the same electric potential

Posted by Kavita Pandya 6 years, 6 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

prove that the charge induced in a rod is perpendicular magnetic field is independent of time chapter 6..... pls ans

Posted by Priya Dharshini ? 6 years, 6 months ago

CBSE > Class 12 > Physics

15 answers

Priya Dharshini ? 6 years, 6 months ago

MM... even i didnt know these things... ya here are many people to help me( everyone ) in studies truly said. U have good power to understand people. It will take u long way.. mark this lines.??

1Thank You

Priya Dharshini ? 6 years, 6 months ago

REally..... what did u learn from me..?? Say atleast 2. I would beleive??

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Priya Dharshini ? 6 years, 6 months ago

True...

1Thank You

Řøhăň Řąjpůť ✌️✊ 6 years, 6 months ago

I think this autocorrect mode... change everything... ? ?

1Thank You

Priya Dharshini ? 6 years, 6 months ago

*priya..

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Priya Dharshini ? 6 years, 6 months ago

Ohh.. ya i didnt notice her spelling... in my name )riya Dharshini.. h is there.. so... ? made a mistake... ya.. she is learning many things from amam and u are also learning from him to appreciate others ans... great ..

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Řøhăň Řąjpůť ✌️✊ 6 years, 6 months ago

? ? ?mujhe bhi aesa he lagta hai she is Learning many things from aman ?? btw correct spelling is Darshana. ?

1Thank You

Priya Dharshini ? 6 years, 6 months ago

TO dharshanaa... she said no need thanks..

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Řøhăň Řąjpůť ✌️✊ 6 years, 6 months ago

? ? to whom u are saying.?

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Priya Dharshini ? 6 years, 6 months ago

?? learning many things from aman...?

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Řøhăň Řąjpůť ✌️✊ 6 years, 6 months ago

gud going.. darshu ?

1Thank You

Ďãřşháñăã Yadav ? ? ? 6 years, 6 months ago

no need ??

2Thank You

Priya Dharshini ? 6 years, 6 months ago

Thanks..

1Thank You

Ďãřşháñăã Yadav ? ? ? 6 years, 6 months ago

I have skipped some statement before the equation becoz it consume some time.. but hope u understand it. ?

1Thank You

Ďãřşháñăã Yadav ? ? ? 6 years, 6 months ago

we can prove this by faraday law of electromagnetic induction. ➡️ e is directly proportional to the dθ/dt... ➡️ e =-k dθ/dt.. ➡️ e=-dθ/dt.. becoz k=1 ➡️ if coil contains N turns e=-N dθ/dt ➡️ I=-N/R *dθ/dt ➡️ CHARGE induced in time dt... dq=- Ndθ/R ➡️ But,, Nθ= effective flux linkage =θ ➡️ dq=dθ /R.. from this we conclude that charge induced is independent of time.

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Find time period and frequency of SHM of bar magnet in uniform 2d magnetic field

Posted by Pushp Kumar 6 years, 6 months ago

CBSE > Class 12 > Physics