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ECE 4C > ELECTRONICS > Flashcards

ELECTRONICS Flashcards

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1
Q

It is the directional motion of electrons

A

Electric Current

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2
Q

It deals with stationary charged particles

A

Electrostatic

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3
Q

The effects of moving electrons

A

Magnetism

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4
Q

Magnetism due to electric current

A

Electromagnetism

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5
Q

what is the charge of the electron

A

-1.602x10^-19

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6
Q

what is the charge of proton

A

1.602x10^-19

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7
Q

what is the mass of the electron

A

9.109x10^-1

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8
Q

what is the mass of the proton

A

1.67x10^-27

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9
Q

what is the mass of the neutron

A

1.67x10^-27

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10
Q

who introduced the concept of electric field lines?

A

Michael Faraday

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11
Q

It deals with the phenomena due to attractions or repulsions of electric charges that are not moving

A

Electrostatics

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12
Q

It states that the force of attraction or repulsion between two charges is directly proportional to the value of each charge

A

Coulomb’s first law

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13
Q

it is the vector sum of two charges that exert forces on another charge

A

Principle of Superposition

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14
Q

the force that caused another particle to move

A

EMF

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15
Q

The total number of electric field lines passing a given area in a unit of time

A

Electric Flux Density

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16
Q

The electric lines in an electric field

A

Electric Flux

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17
Q

It is the amount of work needed to take a 1 coulomb charge from one point to another

A

Electric Potential Difference

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18
Q

materials with less than 4 valence electrons

A

conductors

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19
Q

materials with more than 4 valance electrons

A

Insulators

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20
Q

materials with exactly 4 valance electrons

A

semiconductor

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21
Q

materials that produce zero net magnetic force

A

Non-magnetic materials

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22
Q

a property of particles that causes them to experience a force when placed in an electric or magnetic field. It comes in two types: positive and negative.

A

electric charge

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23
Q

states that the force between two charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them

A

Coulomb’s law

24
Q

a region around a charged object where other charges experience a force.

A

electric field

25
Q

the opposition to the flow of electric current in a material

A

resistance

26
Q

states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor

A

Ohm’s law

27
Q

the rate at which electrical energy is transferred by an electric circuit.

A

Electric power

28
Q

a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.

A

magnetic field

29
Q

the process by which a changing magnetic field creates an electric current in a conductor.

A

electromagnetic induction

30
Q

states that the induced electromotive force (EMF) in any closed circuit is proportional to the rate of change of the magnetic flux through the circuit.

A

Faraday’s Law of Induction

31
Q

states that the direction of the induced current in a closed loop due to a changing magnetic field is such that it opposes the change in magnetic flux that produced it.

A

Lenz’s law

32
Q

a coil of wire that generates a magnetic field when an electric current is passed through it.

A

solenoid

33
Q

it generates a magnetic field when an electric current passes through it. Its strength can be adjusted by changing the current or the number of coils.

A

electromagnet

34
Q

a device that changes the voltage of an alternating current (AC) by using electromagnetic induction between two or more coils of wire.

A

transformer

35
Q

refers to the total magnetic field passing through a given area. It is measured in weber (Wb).

A

Magnetic Flux

36
Q

the production of a voltage difference across an electrical conductor, transverse to the electric current and magnetic field applied, due to the Lorentz force acting on the moving charges.

A

Hall Effect

37
Q

The situation where any increase in the amount of magnetizing force will have very little magnetic effect

A

Saturation

38
Q

It is the intensity of the magnetic field that causes a material to become magnetised

A

Magnetic Field of Force

39
Q

what is present whenever a charge moves?

A

Magnetic Field (B)

40
Q
A
41
Q

It is the ability to allow or set up a magnetic field

A

Permeability

41
Q

what is the unit for permeability

A

Henry/meter

41
Q

what happens to the magnetic flux when a magnetizing force is applied to a demagnetized ferromagnetic material

A

It rises

42
Q

This type of magnet exhibits permanent magnetism

A

Natural magnet

42
Q

this magnet is made of hard magnetic material

A

Permanent magnet (AlNiCo)

43
Q

It is the magnetic flux left after the magnetizing force reaches zero

A

remanence or residual magnetism

43
Q

The amount of force that can bring residual magnetism to zero

A

Coercive force

44
Q

the ability to retain magnetism when magnetizing force is removed

A

retentivity

45
Q

The lagging of the magnetization of a ferromagnetic material

A

Magnetic Hysteresis loop

46
Q

It is the ratio of the total flux (flux in the iron path) to the useful flux (flux in airgap)

A

Flux density

47
Q

Flux density is produced in it due to its own induced magnetism

A

Intensity magnetization

48
Q

Non-metallic material that has ferromagnetic properties of iron

A

Ferrites

49
Q

What is the opposition to the flow of current in an electric circuit?

A

resistance

50
Q

What is the power wasted since the resultant heat is not used?

A

Dissipation

51
Q

Resistors with ____ resistance value have lower voltage ratings since they have less current

A

high

52
Q
A

ECE 4C (4 decks)

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