Electronics

Question 1

Electricity is

Answer 1

the flow of tiny particles called electrons

Question 2

electric charge

Answer 2

is a quantity of electricity that is related to the

balance of electrons and protons in an object.

Question 3

3 basic kinds of particles that make up atoms

Answer 3

protons, electrons, neutrons

Question 4

imbalance of charges produces

Answer 4

static electricity

Question 5

Electric charge affects

Answer 5

the way that objects interact

Question 6

the Coulomb force

Answer 6

The electric force that one charged particle produces on another is called

Question 7

Coulomb force is name after

Answer 7

Charles-Augustin de Coulomb.

Question 8

which material is always electrically conductive

Answer 8

metals

Question 9

speed of light

Answer 9

186,000 miles per second

Question 10

an example of a conductor and an insulator

Answer 10

• silver, copper, gold

* rubber, oil, glass

Question 11

what is a circuit

Answer 11

a never-ending looped pathway for

charge carriers

Question 12

what happens when you cause a discontinuity in a circuit?

Answer 12

will prevent charge flow throughout the entire circuit

Question 13

voltage

Answer 13

the measure of work required to move a unit charge from one location to another, against the force which tries to keep electric charges balanced.

Question 14

voltage (in the context of circuits)

Answer 14

voltage is the amount of potential energy available (work to be done) per unit charge, to move charges through a conductor

Question 15

electric current

Answer 15

flow of electric charge in a circuit

the rate of charge flow past a given point in an electric circuit

Question 16

unit of electric charge

Answer 16

ampere

Question 17

watts

Answer 17

rate at which an electrical device is converting energy from one form into another

Question 18

currents flow… things and voltages are applied… things

Answer 18

through, across

always refer to the voltage between two points or
across two points in a circuit. Always refer to current through a device or connection in a circuit.

Question 19

how are voltages generated?

Answer 19

by doing work on charges in devices

Question 20

we get currents by

Answer 20

placing voltages across things

Question 21

can use…. to measure current

Answer 21

a multi-meter

Question 22

repeatedly changes its direction of current

Answer 22

alternating current

Question 23

alternating current is caused by

Answer 23

voltages at the terminals swing from positive to

negative and back

Question 24

always flows in the same direction, from positive to negative

Answer 24

direct current

Question 25

Kirchoff’s Law states what about voltage

Answer 25

the sum of all voltage drops within a closed

circuit are equal to zero.

Question 26

Kirchoff’s current law states

Answer 26

that there is a conservation of charge within a circuit,
this means that the sum of the current at a particular point (or component/node) are equal to the currents exiting that point.

Question 27

resistance is measured in

Answer 27

ohms

Question 28

resistance is

Answer 28

the opposition to the flow of current

Question 29

ohms law descirbes

Answer 29

the proportional relationship between voltage and

current,

Question 30

Resistors function by

Answer 30

dissipating power as heat

Question 31

what are capacitors used for?

Answer 31

waveform, generation, filtering, and blocking and bypass applications

Question 32

the most common uses of capacitors,

Answer 32

bypass and coupling

Question 33

is the current proportional to voltage in a capacitor?

Answer 33

no

Question 34

how do capacitors combine in parallel and series compared to resistors?

Answer 34

capacitors in series combine in the
same way as resistors in parallel, conversely
capacitors in parallel combine like resistors in
series

Question 35

Inductance (L) can be defined as

Answer 35

the property where a conductor exhibits opposition to the change of electric current flowing through it.

Question 36

what is inductance measured in?

Answer 36

henry (H)

Question 37

the inductance of an inductor depends on…

Answer 37

its the physical properties and construction.

Question 38

inductance may be increased by

Answer 38

reducing the length of the coil, increasing
the cross sectional area (A), increasing the number of
turns in the coil (N), and by using a core with a high level of permeability (μ)

Question 39

dialetric means…

Answer 39

material will polarize when in contact with an electric field

Question 40

What is the difference between

an Inductor and Capacitor?

Answer 40

• Capacitor stores energy in form of an Electric Field and an Inductor stores energy in form of a Magnetic field
• Capacitor tries to level the voltage in a circuit / and if the current changes, an inductor will charge or
  discharge to equalize the current through the circuit.

Question 41

impedance is

Answer 41

the sum of resistance, capacitive reactance, and inductive reactance
Impedance (Z) is the measure of the total opposition to current flow in an alternating current circuit.