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Ďãřşháñăã Yadav ? ? ? 6 years, 2 months ago

Well g8 Rohan. ✌️

Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

leakage is minimise by enclosing the chamber filled with N2 at high pressure.

Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

in working there is a derivation whose final Equation is V(r)-V(R) =q/4πεο. (1/R-1/r). If we connect the smaller and the larger sphere with a conducting wire, the charge q, however small, on the smaller sphere gets transferred to the bigger sphere. Here, if we introduce a small charged sphere into a larger spherical shell, as shown in the system, the charge on the larger sphere keeps increasing. Similarly, the potential at the larger sphere would also keep rising as the charge increases, until the breakdown field of air is reached. The Van de Graaff generator works on the same principle.

Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

Construction :---. It uses a moving belt that accumulates charge on a hollow metal structure designed like a globe, placed on the top of a column that is insulating in nature and thus, creating a very high electric potential in the order of a few million volts. This results in a very large electric field which is used to accelerate charged particles.

Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

➡️The working principle of Van De Graff generator is based on : (i) the action of sharp points, i.e., the phenomenon of corona discharge. (ii) the property that charge given to a hollow conductor is transferred to outer surface and is distributed uniformly over it.

3Thank You

ANSWER

Main difference between solenoid and toroid

Posted by Rudra Singh 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

Solenoid is a straight coil having uniform number of turns per unit length. A Toroid is an endless Solenoid.It is in the form of Hollow sphere, having large number of turns.

3Thank You

Randip Singh 6 years, 2 months ago

The differnce is that the solenoid is the straight coil whereas the toroid is the bent solenoid which have ring or doughnut shape. And toroid have greater magnetic field as compare to solenoid at its center due to ring shape.

ANSWER

Is "de Broglie explanation of bohr's second postulate" in syllabus???

Posted by Ankush Saini 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Shivam Chaurasia 6 years, 2 months ago

Yes.

ANSWER

Where on the surface of earth the vertical components of earths magnetic field is zero

Posted by Saurabh Singh 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 2 months ago

At magnetic equator, vertical component of earth's magnetic field will be zero. As vertical component of field is B_v= Bsinδ and at equator δ = 0^o

ANSWER

Best laboratory book cbse class 12 with proper ready-made observation

Posted by Supriya Mandal 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

MBD grp

Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 2 months ago

Search CBSE lab manual

ANSWER

In this year the practical occur internal school or not

Posted by Tejasvi Singh 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 2 months ago

School will be recognised of 12th so give pratical in school

Priya Dharshini 6 years, 2 months ago

External.... u will go to other school to give practicals..

ANSWER

What is the diffrence b/w £mf and potential diffrence of a cell ?

Posted by Meena Gupta 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 2 months ago

Electromotive force (emf) Potential Difference (Pd) E.m.f is the energy supplied to the unit charge by the cell. Potential difference is the energy dissipated as the unit charge passes through the components. E.m.f is the cause. Potential difference is the effect. The emf is also present even when no current is drawn through the battery. Potential difference across the conductor is zero in the absence of current. Its unit is volt. Its unit is volt. It remains constant. It does not remain constant. It is always greater than potential difference. It is always less than emf. It transmits current both inside and outside of the cell. Potential difference transfer current between two points in the cell. Its symbol is E. Its symbol is V. Its formula is E = I (Rtr) Rtr = total external and internal resistance. Its formula is V = E – Ir It does not depend on circuit resistance. It directly depends on the resistance between two points of measurement. It causes in electric, magnetic and gravitational field. It induces only in electric field.

ANSWER

Tell about Schrodinger cat hmmm plz ???nd follow me on instagram - harshb4567

Posted by Harshit Bajpai 6 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Sample paper for class 12 2019-20

Posted by Varun Kumar Voruganti 6 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Use ki

Posted by Jyoti Diwakar 6 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

what is the difference between potentio meter and meter bridge

Posted by Jabid Hussain 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Vivek Gupta 6 years, 2 months ago

Potentiometer is use in measure very Small potintial differant and meter brigde use in unknown resistance of wire

Anish Pandey 6 years, 2 months ago

Potentiometer used to measure resistance of cell whereas meter bridge measure only resistance of resistor.

ANSWER

Two rods of copper and aluminium of each of equal length 20cm and equal croo section area 2mm they are joined in series (2) in parallel. Find the resistance of the combination in each case resistance of copper is 1.7

Posted by Astha Sahu 6 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip down at 60° with the horizontal. The horizontal components of the earth’s magnetic field at the place is known to be 0.4 G. Determine the magnitude of the earth’s magnetic field at the place.

Posted by Rahul Singh Bhandari 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 2 months ago

Given that,
Angle of dip, {tex}\delta = 60^\circ = \frac{\pi }{3}{/tex}
and horizontal component of the earth's magnetic field is,
B_H = 0.4 G (G=10^-4 T)
B_H = 0.4 {tex}\times{/tex} 10^-4 T
Magnetic field of earth (B) =?
{tex}\because {/tex} Horizontal component of the earth's magnetic field,
{tex}B_H = B cos \delta{/tex}
{tex}B = \frac { B_H } { \cos \delta } \\ B = \frac { 0.4 \ \times\ 10^{-4} \ T } { \cos 60 ^ { \circ } } \\ B = \frac { 0.4 \ \times\ 10^{-4} \ T } { 1 / 2 } \\ \therefore B = 0.8 \ \times\ 10^{-4} \ T \\ \therefore B = 8 \ \times\ 10^{-5} \ T{/tex}

ANSWER

Important question or related question in board exams question paper assesment

Posted by Shivani Sharma 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Naresh Rajput 6 years, 2 months ago

In straight current carying conducter where magnetic field is form

ANSWER

How to solve numericals????

Posted by Harshit Bajpai 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Priya Dharshini 6 years, 2 months ago

I am also weak in physics numericals... i am also trying to solve it by practicing so many times. Dont give up..

Priya Dharshini 6 years, 2 months ago

Only thing i can say learn concept before solving, remember all formulae practice as many as u can.... use pen to build ur confidence do ncert completely.solve important questions from this app do sl arora...

ANSWER

What is the valueof magnetic field across the ends of solenoid

Posted by Shivank Bhardwaj 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Ayush Kumar Singh 6 years, 2 months ago

Mu not nI/2

Hardik Singhaniya 6 years, 2 months ago

ANSWER

Find the magnetic field due to a rectangle at its centre?

Posted by Pradeep Pandey 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Anish Pandey 6 years, 2 months ago

ANSWER

Why potentiometer shows one way deflection?

Posted by Aashi Soni 6 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A charge is placed at the centre of a cube of side l.what is the electri flux passing through each face of the cube

Posted by Aman Tripathi 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Jagjeet Singh 6 years, 2 months ago

(1/6)q/epsilon

ANSWER

Two charge of magnitude s -2qand +qare located at point (a,0)and (4a,0).what is the electri flux throgh a sphere of radius 3a due to these charge with its centre at origin.

Posted by Aman Tripathi 6 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the electri flux through a cube of side 1cm which Incloses an electri dipole

Posted by Aman Tripathi 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Veena Singh☺️? 6 years, 2 months ago

It will be zero because net charge in the cube will be zero as electric dipole consists of charges of equal magnitude but opposite sign.

ANSWER

Would solving an additional exercises is necessary?

Posted by Avi Verma 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Ujjwal Tiwari 6 years, 2 months ago

If u think

Soumya Kumari 6 years, 2 months ago

Yes

ANSWER

What is electric field lines

Posted by Sunanda Bundela 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Rajat Barwar 6 years, 2 months ago

Good answer but I want to add some more, 1)Density of these lines shows the strength of electric field in that area. 2)Also electric force is only experienced in the area having these lines.(the basic reason for this concept of field lines). Sorry, for any error.

Vijaya Dasu 6 years, 2 months ago

. Electric Field Lines can be easily defined as a curve which shows the direction of an electric field when we draw a tangent at its point.

ANSWER

What is eddy current? ?

Posted by Ankit Kumar 6 years, 2 months ago

CBSE > Class 12 > Physics

3 answers

Shivam Chaurasia 6 years, 2 months ago

Eddy current are induced current in metallic substance

Priya Dharshini 6 years, 2 months ago

Eddy currents are induced currents in the body of conductor when subjected to changing magnetic flux. .

Aditya Dwivedi 6 years, 2 months ago

eddy current is an induced current which oppose the motion of real current to flow

ANSWER

A luminous object s is located at the bottom of the big pool of liquid of refractive index u and depth h .the object s emits ray upward in all direction ,so that a circle of light is formed at the surface of liquid by the rays which are refracted into air what happen to the rays beyond the circle? Determine radius and area of circle

Posted by Kamal Paikra 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Aditya Kr Yadav 4 years, 5 months ago

answer

7Thank You

ANSWER

Magnetic fields

Posted by Rohit Yadav 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Rohit Yadav 6 years, 2 months ago

Haa

Ďãřşháñăã Yadav ? ? ? 6 years, 2 months ago

the space around the magnet within which its influence can be experienced is called magnetic field.

6Thank You

ANSWER

Half yearly syllabus

Posted by Animesh Singh Singh 6 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Ďãřşháñăã Yadav ? ? ? 6 years, 2 months ago

1st book... whole ... but it's upto ur teacher which book they choose first it can be 1st aur it can be second aur it can be combination of both the book. anything can happen.

Srishti Choudhary ✍⏳ 6 years, 2 months ago

Its depends on ur school...how much they completed b4 half yearly exams...??

ANSWER

what's the unit of electric dipole moment ???

Posted by Ibrahim Khan 6 years, 2 months ago

CBSE > Class 12 > Physics

4 answers

Premesh Tyagi 6 years, 2 months ago

C-m

Santy Baralu 6 years, 2 months ago

C-m

Ďãřşháñăã Yadav ? ? ? 6 years, 2 months ago

C-m

Veena Singh☺️? 6 years, 2 months ago

Its unit is C-m . ( Coulomb - meter )

ANSWER

what's the unit of dupole

Posted by Ibrahim Khan 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Achyuth M H 6 years, 2 months ago

Cm( coulomb metre)

ANSWER

A closely wound solenoid 80 cm long has 5 layers of winding of 400 turns each. the diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.

Posted by Vikas Yadav 6 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 2 months ago

Here, l= 80 cm = 0.8 m, N = 5 {tex}\times{/tex} 400 = 2000
I = 8.0 A, D = 1.8 cm, n = no. of turns per unit length
Magnitude of magnetic field inside a solenoid near its center
{tex}n = \frac{{Total\;turn}}{{length}}{/tex}
{tex}n = \frac{{2000}}{{0.80}}{/tex}
{tex}B = {\mu _0}nI = \frac{{4\pi \times {{10}^{ - 7}} \times 2000 \times 8.0}}{{0.80}}{/tex}
{tex} = 8\pi \times {10^{ - 3}}T = 2.5 \times {10^{ - 2}}T{/tex}