Science chpt 14

Question 1

What are the two main differences between electricity and electronics?

Answer 1

1) electronic components: are made with semi-conductors, while electronic circuit are made with conductors.
2) size: electronic are miniature, less intensity
3) Electronics: circuit can be much more finely controlled

Question 2

what is the difference between alternating current and direct current?

Answer 2

alternating: a current in which the electrons are moving back and forth
direct: a current in which the electrons are moving in the same direction continuously

Question 3

what is the definition of an electrical function?

Answer 3

the role that a component plays in the control or transformation of electric current

Question 4

What is the definition of a power supply?

Answer 4

1) a power supply is the electrical function performed by any components that can generate or provide an electrical current in a circuit

Question 5

What are examples of a power supply? what are the advantages and disadvantages?

Answer 5

1) battery
- Applicance are portable
-need to be replaced after a certain time
-promotes pollution
2)Electrical outlet
-stable/long lasting power
- green energy
-appliances are not portable
- Power outages
3) Photovoltaic cell
-provides power to isolated area
-power portable devices
-long life span

Question 6

what is conduction by definition?

Answer 6

is the electrical function performed by any component that can transmit electrical current from one part of a circuit to another

Question 7

What items has the function of conduction?

Answer 7

electrical wires

Question 8

what is insulation by definition?

Answer 8

the electrical function performed by any component that prevents an electric current from flowing

Question 9

what are examples of insulators?

Answer 9

1) plastic
2) ceramics
3) rubber

Question 10

what is protection by definition?

Answer 10

the electrical function preformed by any component that can automatically cut current flow in the event of a power surge

Question 11

what are examples of items that provide protection?

Answer 11

1) fuses
2) breakers

Question 12

what is the difference between fuses and breakers?

Answer 12

fuses; can only with-hold a certain amount of energy until it exceed and blows. then need to be replaced
breakers; can be reset as many times as necessary

Question 13

what is a resistor by definition?

Answer 13

an component designed to limit the flow of electrons through an electrical circuit

Question 14

what is control by definition?

Answer 14

is the electrical function preformed by any component that can close and or open a circuit

Question 15

When the circuit is closed or open is the current flowing in a loop?

Answer 15

closed

Question 16

what are the 4 types of switches

Answer 16

1) push-button switch
2) toggle switch
3) rocker switch
4) magnetic contact switch

Question 17

what are the 4 types of switches (poles)

Answer 17

1) SPST switch (single pole, single throw)
2) SPDT switch (single pole, double throw)
3) DPST switch (double pole, single throw)
4) DPDT switch (double pole, double throw)

Question 18

what is energy transformation by definition?

Answer 18

the electrical function preformed by any component that can transform one type of energy (electrical) into a different type of energy

Question 19

what are examples of energy transformers?

Answer 19

1) incandescent light bulbs (electrical -> luminous) (ex; flashlight)
2) Heating elements (electrical -> thermal) (ex; ovens)
3) Piezoelectric crystals (electrical-> mechanical or sound) (ex; speaker)
4) electromagnets (electrical energy-> magnetic energy) (ex; tape recorder)

Question 21

`what the ability to store energy in a capacitor called?

Answer 21

Farads

Question 22

what a diode by definition?

Answer 22

is a device that allows electric current to flow in only one direction

Question 23

what is a transistor by definition?

Answer 23

an electronic device used to block or amplify a electrical current

Question 24

what are the parts of a transistor and how does current flow

Answer 24

1) collector
2) emitter
3) base
flows from collector to emitter to base