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Electromagnetic Wave theory – given by Clark Maxwell. Main points are
energy is emitted from any source continuously in the form
Faraday connected a coil to a galvanometer and brought a magnet close to the coil or took it away form the coil. In both the case he observed deflection in the galvanometer.
Consider a coil connected to a battery through a key. When the circuit is switched on the current starts growing through the coil and very soon acquires its maximum value. Duri
EMF can be induced by every that mean is which flux linked with the conductor became varying.
EMF induced in a straight conductor moving in the magnetic field.
φ =BA
Whenever the primary circuit is switched on or off deflection is observed in the secondary circuit. At the time of switching on or the circuit the current in primary various wh
Transverse nature of EM waves
It is a device which works on AC. It is used to increase as decrease the magnitude of alternate voltage as alternating current.
Principle :-
Whenever a large conductor i.e. 2 dimension or 3 dimension conductor in placed in varying magnetic field an EMF is induced in it due to the find closed paths within concentric circular currents known as eddy currents.
Eddy currents by nature are con
Electromagnetic waves
It is a disturbance which carries energy in space due to the simultaneously time varying mutually perpendicular electric and
Modified Ampere Circuit Rule or Maxwell Ampere Circuital Rule
According to ampere circuit rule
A changing electric field produces a changing magnetic field and vice versa which gives rise to a transverse wave known as electromagnetic wave. The time varying electric and
Force
A pull or push which changes or tends to change the state of rest or of uniform motion or directionof motion of any object is called force. F
1.The permeability of a magnetic material is 0.9983. Name the type of magnetic materials it represents.
Charge --Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.
Two kinds of charges : The following simple experiment proves these facts:
Rub a gla
Hertz produced and detected EM Waves experimentally.
Experimental setup is as shown below.
Dual nature of matter – radiation-
The wave associated with a particle is called matter wave or de Broglie wave.
Space Communication:- It refers to sending, receiving and processing of information through space. There are four odes of space communication.
De-Broglie’s Equation:-
According to de-Broglie a moving particle can be associated with a wave. So the waves associated with a moving materi
Particle nature of electromagnetic radiation
(Planck’s quantum theory)
Radiant energy is emit
It states that the force of attraction or repulsion between two stationary point charges is
Directly proportional to the product of the magnitudes of the two
EM waves propagate in 3 different moods:-
(1) Ground wave propagation
(2) Sky wave propagation
(3) Line of sight propagation
When a sound wave travels through a medium such as air, water or steel, it will set particles of medium into vibration as it passes through it. For this to happen the medium m
Sample Paper
Class – XI
Subject - Chemistry
Time : 1:30 hr
Radioactivity – discovered by Henry Becquerel.
“ spontaneous emission of active radiation from a radioactive substance cal
Electron Emmision-The liberation of electrons from the surface of a metal due to any reason is known as Electron Emission.
If we atke a piece
c = 1/(µ0∈0)1/2
Value comes out to be 2.99 x 108
Velocity of EM
Photons:- Electromagnetic radiation carry energy in the form of packets or bundles known as photons or quanta.
Properties of Photons:-
Friction
When two bodies are kept in contact, electromagnetic forces act between the charged particles (molecules) at the surfaces of the bodies. Thus, each body exerts a contact force of the other. The magnitudes of the contact forces acting on the two bodies are e
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