Hello friends welcome to my channel soni
singh physics.Today I'll be talking
about electromagnetism, if you like the
video please hit the like button and
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Hello friends just now you saw a clip
there were some instruments, I have a
question for you, can you identify any
two similarities in between them ?Keep
thinking by that time I'll share a story
with you Hans Oersted   was the name
of a scientist, he was working in his
laboratory with some electrical circuits
there was a compass needle kept near the
circuits when he connected the circuit
to the power supply he observed a very
peculiar thing, there was a deflection in
the compass needle then he did the same
thing again and again and then he came
on the conclusion that the current carrying
conductor has an impact on the magnetic
needle and with that he brought the idea
in this world about the Electromagnetic
effect. These are the topics which I am
going to discuss in this video magnetic
lines of forces, electromagnetic effect,
right-hand thumb rule, right hand gripped
rule, and Fleming's left hand rule. After
every topic I will be discussing a
question which will be helpful for you
to understand the concept in a better
way.This  is a magnetic needle now I will bring a
magnet next to that you can see there is
a high deflection in the needle .When I'm
taking magnet away the needle is getting
is stabilized and when the magnet is
coming next to the needle there is a
deflection.
it means this magnet has some force on
this needle. This force is known as
magnetic force.It depends upon the
distance, if the distance is less
magnetic force will be high and if the
distance is more the magnetic force will
be less. This is the graphical
representation of magnetic force. We
represented through lines that is called
magnetic lines
of forces, this is a bar magnet and as we
know every Magnet have two poles,North pole and South pole. if you observe
the direction in these lines
it starts from north and entered through
the South ,so we can say that magnetic
lines of force works in the direction of
North to South .Friends I know you might
have got the answer about the
similarities, the two similarities are
first they all run on the electric
current second there is a common
instrument present in them that is
Electric motor so they all work on the
same principle that is Electromagnetism.
This is an electrical  circuit and now we are going
to see the effect of this electric
current on this magnetic needle .As you
can see when I'm moving the wire next to
the needle  there is a deflection in this
needle so this this force, this effect is
called Electromagnetic effect.
As for right hand Thumb rule thumb shows
the direction of current and curling finger
shows the direction of field lines.This
is a question based on Right hand thumb
rule ,A straight wire conductor passes
vertically through a piece of cardboard,
the direction of the current is upward
draw arrows to represent the direction
of magnetic field lines ? So to answer
this question we'll use right hand thumb
rule, keep your right hand over here and
you can see that the direction of
current upward so the field lines will
be in Anti-clockwise direction, like this.
As per Right hand grip Rule when you hold
a conductor in your hand then the
curling finger shows the direction of
current and the thumb shows the
direction of North Pole. This is a
question based on right hand grip rule,
This is a solenoid, which end of the
solenoid represents North pole? so when you
see the direction of current in the
solenoid it is going in this direction
so when you use the right hand over here
curling finger is showing the direction of
current and thumb will determine the
direction of North Pole so the thumb is
pointing towards B ,so the B will be a
North pole.
As per Fleming's left hand rule first
finger shows the direction of field
second finger shows the direction of
current and Thumb shows the direction
of thrust when we keep first two fingers
at right angle to each other. You can
remember in this way First Field seCond
Current and Thumb Thrust .This is a question
based on Fleming's left hand rule. The
question is A current flows in the
wire running between the North and South
Pole of a magnet .What will be the
direction of the force due to the magnet
so to answer this question first we have
to find out the direction of magnetic
lines of forces so as we know that will
be from North to South, now we will  use
our left hand and we will  see the
direction of force, so if you can see
this is the direction of current this is
the direction of magnetic lines of
forces so the force on this conductor
will be towards upward so the answer
will be upward direction. I hope you have
understood the concept clearly if you
have any questions please do comment
thank you
