No products in the cart.

Ask questions which are clear, concise and easy to understand.

Aman Pal 1 year ago

proton ki khoj kisne ki

Asmit Uniyal 5 months, 1 week ago

6.25 xx10^(18)`

Mohsin Khan 1 year, 4 months ago

Sidhe board exam hi hone hamare madam.

Ayush Kathait 1 year, 3 months ago

Hn

Mohsin Khan 1 year, 4 months ago

30% ruduce hai

Prem Joshi 1 year, 8 months ago

So you can put value in this equation

Prem Joshi 1 year, 8 months ago

K=e/e0

Prem Joshi 1 year, 8 months ago

V is proportional To I . V/I is an constant

Gaurav Seth 2 years, 1 month ago

## BIOT-SAVART LAW:

• We already know now that current carrying conductor generates magnetic field around themselves. Biot-Savart law just mathematically states the intensity of this magnetic field at a point.
• According to the Biot-Savart law, magnetic field dBdue to current element idl, at a pointP situated at distancer from the current element idl,is:

i) directly proportional to the current element idl, ii) directly proportional to the sine of the angle (θ) between current element and r, and iii) inversely proportional to the square of the distance r between current element and the point

dB∝idl (sinθ)/r2

dB = (μo/4π)×idl×(sinθ)/r2

dB = idl × r / r3

Here proportionality constant is  μo/4π = 10-7Tm/A, and μois the permeability of free space (vacuum)

Ayush Kathait 1 year, 3 months ago

An electric dipole is pair of 2 equal and opposite charges separated a short distance apart from it

Yogita Ingle 2 years, 1 month ago

An electric dipole is defined as a couple of opposite charges q and –q separated by a distance d. By default, the direction of electric dipoles in space is always from negative charge -q to positive charge q. The midpoint q and –q is called the centre of the dipole. The simplest example of an electric dipole is a pair of electric charges of two opposite signs and equal magnitude separated by distance.

Yogita Ingle 2 years, 1 month ago

Electric field is a force produced by a charge near its surroundings. This force is exerted on other charges when brought in the vicinity of this field.

• SI unit of electric field is N/C (Force/Charge).
• Electric field due to a charge at a point is the force that a unit positive charge would experience if placed at that point.
• The charge generating electric field is called source charge and the charge which experiences this field is called test charge. Practically, to keep source charge undisturbed due to the electric field of test charge, the test charge is kept infinitely small.
• Since F(Force) is proportional to q (Charge), the electric field is independent of q but depends on r (space coordinates).
• The electric field is symmetric in spherical coordinates.

Yogita Ingle 2 years, 4 months ago

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.

Prem Joshi 1 year, 8 months ago

Abhishek Pal 2 years, 3 months ago

Nyuten

Sumit Rawat 2 years, 4 months ago

Nothing

Shiva Shiva 3 years ago

You tell me in hindi

Yogita Ingle 3 years ago

Huygen's Principle:

(i) Every point on a given wave front (called primary wave front) acts as a fresh source of new disturbance, called secondary wavelets which travel in all directions with the velocity of light in the medium.

(ii) The forward envelope of these secondary wavelets gives the new wave front at any instance.This is called secondary wave front.

Consider a plane wavefront AB incident on a surface PQ separating two media 1 and 2.
The medium 1 is a rarer medium of refractive index n1  in which light travels with a velocity C1  The medium 2 is a denser medium of refractive index n2  in which light travels with a velocity C2.

Subham Kumar 3 years ago

2019 physics class 12th

Yogita Ingle 3 years 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.

Yogita Ingle 3 years ago

Brewster’s law:- Brewster’s law states that at any particular angle of incidence, reflected ray is completely polarized; and the angle between reflected and refracted ray is 900.

G L Badola 3 years ago

The energy obtained from the conversion of nuclear mass is known as nuclear energy

## myCBSEguide

Trusted by 1 Crore+ Students

#### Question Paper Creator

• Create papers in minutes
• Print with your name & Logo
• 5 Lakhs+ Questions
• Solutions Included
• Based on CBSE Syllabus
• Best fit for Schools & Tutors

## Test Generator

Create papers at ₹10/- per paper

## CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app