Table of Contents
How motional emf is created?
This induced emf due to the motion of an electric conductor in the presence of the magnetic field is called motional emf. Thus, emf can be induced in two major ways: Due to the motion of a conductor in the presence of a magnetic field. Due to the change in the magnetic flux enclosed by the circuit.
Who discovered motional emf?
Michael Faraday
Electromagnetic induction was discovered by Michael Faraday, published in 1831.
What is the formula for motional emf?
emf = LvB
An emf induced by motion relative to a magnetic field is called a motional emf. This is represented by the equation emf = LvB, where L is length of the object moving at speed v relative to the strength of the magnetic field B.
Which rule is used in motional emf?
right hand rule
The direction of induced emf is determined by right hand rule. As per the the rule, if the thumb is pointed in the direction of motion of the conductor and the first finger is pointed in the direction of the magnetic field (north to south), then the second finger represents the direction of the induced current.
What is electromotive force Khan Academy?
EMF is the work done by the cell in moving a coulomb of charge across its terminals. It represents the energy transferred per coulomb to the charges. Some of this energy is lost as heat due to internal energy. Hence the net energy gained by the charge = the emf – heat lost.
Who invented induction?
On 29 August 1831 Michael Faraday discovered the induction of one current by another in his famous induction ring experiment familiar to every student of physics (Fig.
Who discovered electromagnetic induction and who put it to practical use?
60 Hz. Who discovered electromagnetic induction, and who put it to practical use? Michael Faraday and Joseph Henry discovered electromagnetic induction, but Nikola Tesla and George Westinghouse put it to use.
What is e vB?
The electric field in the wire is equal to E = vB. If we place the wire on a conducting rail, a current will start to flow in the circuit formed by the rail and the wire. The emf driving the current is equal to vB times the length d of the section of wire connecting the rails.
How many gods does tesla have?
1 Tesla equals 10^4 Gauss.
What is lost Volt?
Lost volt: The potential difference between the two terminals of a cell decrease by an amount that does not contribute to the circuit, is called lost volt.
How do you make alternating emf?
We know that an alternating e.m.f. can be generated either by rotating a coil within stationary magnetic field or by rotating a magnetic field within a stationary coil.
How did Tesla invent the induction motor?
Tesla’s first foray into inventing was actually a spontaneous one. He conceived the brushless AC motor while on a walk—a design reliant on rotating electromagnets. This revelation, and continued creativity, landed him a job with the Continental Edison Company in Paris.
How did Michael Faraday Discover electromagnetic induction?
He experimented by wrapping two insulated coils of wire around an iron ring. He found that, upon passing a current through one coil, a momentary current was induced in the other coil— mutual induction. If he moved a magnet through a loop of wire, an electric current flowed in that wire.
What did Michael Faraday and Joseph Henry discover?
December 17, 1797 – May 13, 1878 Interestingly, Henry appears to have discovered the principle of electromagnetic induction independently of British scientist Michael Faraday, but because Faraday published his results before Henry, he is credited with the discovery.
What does EventArgs mean?
EventArgs e is a parameter called e that contains the event data, see the EventArgs MSDN page for more information. Object Sender is a parameter called Sender that contains a reference to the control/object that raised the event. Event Arg Class: http://msdn.microsoft.com/en-us/library/system.eventargs.aspx.