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welcome to Maths and Science Academy in
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this video we will be looking at part
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part one of this video we trying to
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understand this simulation consisting of
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only a magnet a light bulb and wires
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starting off with only one loop of
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copper wire two loops up until four
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loops and moving the magnet around we
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can eventually see electricity being
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generated in this case we are going to
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refer the movement of the magnet inside
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the loop as mechanical energy hence the
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moving energy resulting into electrical
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energy from this we were able to define
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what is magnetic flux what is
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electromagnetic induction and we were
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able to define Faraday's law of
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electromagnetic induction ded as the
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induced TMF in a conductor is directly
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proportional to the rate of change of
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the magnetic flux in the conductor where
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N is the number of turns in the coil e
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is emf the electromagnetic force in
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volts delt is change in magnetic flux in
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Weber and delta T is change in time in
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seconds the negative sign shows that the
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emf creates a current and a magnetic
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field that opposes the change in the
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magnetic flux electronamics is the study
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of the relationship between electricity
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magnetism and mechanical phenomena
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what are Fleming's left and right hand
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rules the thumb represents the force
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resulting in the motion of the wire in
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the magnetic field first finger
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represents the magnetic field the first
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finger always points towards the south
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pole of the magnet then the second
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finger represents the direction of the
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current in the wire the simulation shows
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that the magnetic lines of force from
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the external field extend from the north
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end to the southeast pole moving left to
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right resulting to the clockwise
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rotation of the wire this is a
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simulation of a motor because there is
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either an AC or DC power supplying
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electricity and electricity is then
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converted into mechanical energy the
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movement or the clockwise rotation of
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the coil fleming's left-hand rule is
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used in motors an electrical machine is
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a device that converts mechanical energy
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into electrical energy and vice versa a
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motor is a type of electrical machine
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that converts electrical energy into
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mechanical energy this motor can either
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run on AC electrical energy or DC
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electrical energy therefore the motors
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are classified into two main types AC
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motor and DC motor both types of motor
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generate mechanical energy used for
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moving any mechanical load etc but their
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construction control efficiency and
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applications are quite different you
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know more about the basic information
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about a C and DC current and voltage in
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the previous slide which you need to
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study briefly this motor can either run
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on a C electrical energy or DC
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electrical energy supply as this
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simulation illustrates we can see that
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as the electrical energy is being
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converted into mechanical energy and by
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using Fleming's left-h hand rule in
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motors the thumb represents the force
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resulting in the motion of the wire in
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the magnetic field first finger
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represents the magnetic field the first
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finger always points towards the south
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pole of the magnet then the second
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finger represents the direction of the
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fleming's right- hand rule is used in
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similarly when a conductor is moved
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forcefully into a magnetic field an
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induced current results the direction of
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this current can be determined using
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Fleming's right- hand rule
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part one of this video we saw consisting
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of only a magnet a light bulb and wires
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moving the magnet around we can
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eventually see electricity being
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generated in this case we are going to
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refer the movement of the magnet inside
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the loop as mechanical energy hence the
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moving energy resulting into electrical
