Electromagnetic Induction flashcards


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when a magnet moves towards a loop of wire, the ammeter shows the presence of? current
what is electromagnetic induction? electromagnetic induction is the production of voltage across a conductor situated in a changing magnetic
what is an electromagnet? electromagents are magnets which magnetic field is produced by electric currents.
The ___________ disappears when the current is turned off magnetic field
devices that use mechanical energy to induce an electric current are known as? generator
when a wire is rotated in a magnetic field, we generate? induced EMF
what is inductance? inductance is the property of circuits where there is an emf induced into the circuit by the change of flux linkages produced by a current charge
what is self induction? self induction is when emf is induced in the same circuit that current is charging
what is mutual induction? this is the ability to produce a voltage in one circuit by varying current in another
what is the units for inductance? henry, H
The phenomenon of mutual inductance is used in a? transformer
Current produced by an induced emf is also known as? induced current
The induced emf is due to the motion of the? the loop
back emf can be calculated using which formula? Vback = E - Ir
who is credited with the discovery of the induction theory? Micheal faraday
what do we use to determine the direction of current through a loop? faraday's law
The induced emf in a wire loop is proportional to the rate of change of _______ through the loop magnetic flux
The unit of magnetic flux is? weber, Wb
magnetic flux across a coil can be changed by? changing the magnetic field strength, the cross sectional area and the orientation of the coil
Is magnetic flux a scalar? magnetic flux is a scalar
magnetic flux per unit area is called? magnetic flux density or strength of magnetic field or magnetic induction
who came up with lenz's law? Lenz law was suggested by Heinrich Lenz, a German physicist who studied electromagnetism in the 1830's.
what does lenz's law state?, Lenz's law states that a current produced by an induced emf moves in a direction so that the magnetic field it produces tends to restore the changed magnetic flux.
what is lenz's law used for? Lenz's law is used to find the direction of the induced current, and the direction is always going to minimize the magnetic flux.
The minus sign in the lenz's law formula shows the direction of?, induced emf
what do we use to determine the EMF produced by a loop? Lenz's law
what are speedometer eddy currents used to measure? they are used to measure the instantaneous speed of the vehicle
what are diathermy eddy currents used for? they are used for localized heating of tissue in human bodies
what are energy meter eddy currents used for? they are used to measure the consumption of electric energy
who suggested the theory of electromagnetic induction? Michael Faraday in 1831
Electromagnetic induction is the phenomenon of producing _______ electric current
The current produced through electromagnetic induction is called? induced current
_______ produces an induced emf with the aid of a magnetic field electromagnetic induction

when a magnet moves towards a loop of wire, the ammeter shows the presence of?

what is electromagnetic induction?

what is an electromagnet?

The ___________ disappears when the current is turned off

devices that use mechanical energy to induce an electric current are known as?

when a wire is rotated in a magnetic field, we generate?

what is inductance?

what is self induction?

what is mutual induction?

what is the units for inductance?

The phenomenon of mutual inductance is used in a?

Current produced by an induced emf is also known as?

The induced emf is due to the motion of the?

back emf can be calculated using which formula?

who is credited with the discovery of the induction theory?

what do we use to determine the direction of current through a loop?

The induced emf in a wire loop is proportional to the rate of change of _______ through the loop

The unit of magnetic flux is?

magnetic flux across a coil can be changed by?

Is magnetic flux a scalar?

magnetic flux per unit area is called?

who came up with lenz's law?

what does lenz's law state?,

what is lenz's law used for?

The minus sign in the lenz's law formula shows the direction of?,

what do we use to determine the EMF produced by a loop?

what are speedometer eddy currents used to measure?

what are diathermy eddy currents used for?

what are energy meter eddy currents used for?

who suggested the theory of electromagnetic induction?

Electromagnetic induction is the phenomenon of producing _______

The current produced through electromagnetic induction is called?

_______ produces an induced emf with the aid of a magnetic field

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