Nature of Electricity Flashcards

1
Q

Is a form of energy – also an energy carrier.

A

Electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

It is a property of matter.

A

Electric Charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

True or False

The smallest units of charge exist with the electron and the proton.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Electrical charges are measured in the SI unit of coulomb (C). Which means 1 coulomb is equal to ________

A

6.25 x 10^18 electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

It is a type of electricity that resulted of an imbalance between negative and positive charges in an object.

A

Static Electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

________ of objects occurs when they gain a net positive or a net negative charge.

A

Electrification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

It is a study of stationary or resting electric charges.

A

Electrostatics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

It is the attractive or repulsive force between two electrically charged objects.

A

Electrostatic Force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

It is the physical field that surrounds each electric charge and exerts force on all other charges in the field, either attracting or repelling

A

Electric Field

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What law describes below:
The electrostatic force between two charges is directly proportional to the product of their quantities and inversely proportional to the square of the distance between them.

A

Coulomb’s Law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

It is a type of electricity that is the steady flow of electric atom. Is more commonly known as the electric current or electricity as we know it.

A

Dynamic Electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the study of electric charges in motion.

A

Electrodynamics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What type of band is described below:

  • The band contains the outermost electrons of the atom.
  • Maybe partially or completely full of permitted number of electrons.
  • Exist below the forbidden energy gap.
  • low energy state.
A

Valence band

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What type of band is described below:

  • Populated with electrons that have become free from their original atoms.
  • May be empty or partially field.
  • exist above the forbidden energy gap
  • High energy state
A

Conduction Band

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

A type of electrical material that readily allow a flow of electrons. Has a large number of electrons in the conduction band.

A

Conductors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

These are materials that will only allow electron flow in extreme conditions.

A

Insulators

17
Q

True or False

A material with a large number of electrons in the conduction band is a good electrical conductor.

A

True

18
Q

These are materials that under some conditions behaves as an insulator and in other conditions behaves as a conductor. Silicon and germanium are examples of semiconductors.

A

Semi-conductors

19
Q

It is the movement of electric charge or is the moving electrons. It is also defined as the rate of flow of electrons. It is the number of electrons passing through a given point per unit of time.

A

Electric Current

20
Q

Unit of Current: _______

A

Ampere (A)

21
Q

A type of current that flows in only one direction.

A

Direct Current (DC)

22
Q

A type of current that changes direction in cycles as the electric potential of the source changes.

A

Alternating Current (AC)

23
Q

Small current applied to the filament of the x-ray tube.

A

Filament Current

24
Q

The rate of flow of electrons that have traveled across the tube.

A

Tube Current

25
Q

The filament current of about ___ to ___ A will generate tube current measured in milliamperes (mA).

A

5 to 7 Amperes

26
Q

It is the driving force which moves the electrons along the conductor. the ability to do work because of a separation of charges.

A

Electric Potential

27
Q

Unit of Electric Potential: ______

A

Volt (V)

28
Q

It is the impedance to the flow of electrons, thereby reduces the flow of electric current through a circuit. It is dependent on the material used as a conductor.

A

Electric Resistance

29
Q

Unit of Resistance: ________

A

Ohm

30
Q

What are the factors affecting resistance?

A

◦ Material – whether conductor or insulator
◦ Length – long conductor has more resistance
◦ Cross-sectional area – small cross-sectional area has more resistance
◦ Temperature – with metallic conductors, as the temperature rises, resistance is also greater.

31
Q

Defines the relationship between voltage, current and resistance. It only applies to metallic conductors.

A

Ohm’s Law

32
Q

It is the rate, per unit time, at which electrical energy is transferred by an electric circuit.

A

Electric Power

33
Q

Unit of Power: ________

A

Watts

34
Q

As current pass through a cable with a resistance, it is apparent that some of the available electric power will be lost in the cable. The lost energy in the cable is converted to heat. What do you call it _______

A

Power Loss