MAGNETIC EFFECT OF CURRENT
A static charge produces only electric ﬁeld and onlyelectric ﬁeld can exert a force on it.
A moving charge produces both electric ﬁeld ans magnetic ﬁeld and both electric ﬁeld and magnetic ﬁeld
can exert force on it
AGO- PEI-WAVE OPTlcs '1
WA VE OPTICS
Iftwo coherent waves with intensity I1 and I2 are superimposed with a phase difference of If), the resulting
I: II + 12+ 2,31112 cos¢
ELECTRIC CL'RRENT :
Electric charges in motion constitute an electric current. Any medium having practically free electric
charges, free to migrate is a conductor ofelectricity. The electric charge flows from higher potential
energy state to lower
NEWTON’S LAW OF MOTION
There are, basically, five forces, which are commonly encountered in mechanics.
Weight: Weight of an object is the force with which earth attracts it. It is also called the force of gravity
KINEMA TI CS
THINGS TO REMEMBER :
ds dv dv v
r=_ ' =_= '— ' = th' '= —=
T” dt ’3 dt 1” ds ’5 l ’l l ’2 lads
where the symbols have their usual meaning .
The equations of motion for a body moving in straight line with unitonn acceleration, a
KINE TIC THEORY OF GASES
1.Assumption of kinetic theory of gases
(1) A gas consist of particles called molecules which move randomly in all directions.
(2) These molecules obey Newton‘s law of motion.
(3) Size of molecule negligible in comp
Gravitation is the force of attraction between any two point particles in the universe. It is given by:
F: 2 4
where G is universal gravitational constant. The value ofG = 6.6? X 10'11 thzikgl
THERMA L EXPANSION
Deﬁnition of Heat :
Heat is a form of energy which is transferred between a system and its surrounding as a result of
temperature difference only.
Thermal Expansion : Expansion due to increase in temperature.
1. Type of thermal expansio
When a conductor is moved across a magnetic field, an electromotive force (emf) is produced in the
conductor. lfthe conductors forms part ofa closed circuit then the emfproduced caused an electric
current to flow round the circ
CENTRE OF MASS )‘lOl—‘IENTUS—‘I & COLLISION
The action offorce with respect to time is defined in terms ot‘lmpulse, that is,
I = J th = mvf.— mv.l =Ap
Graphically, impulse is the
area under lhc F-l graph
In the absence of a net exter
C I R C ULAR M 0 HON & WORK P0 WEE ENER G }’
A body moving with constant speed in a circular path is continuously accelerated towards the centre of
rotation. The magnitude of this normal acceleration is given by
_ "in _ 2
an — T — [D 1'
\-' is the c