Physics: Current Electricity

Question 1

What is the function of the sources of electrical energy

Answer 1

provides electrical emergy in circuit

Question 2

what are the 4 basic parts of a circuit

Answer 2

source or energy, load, control device, conducting wires

Question 3

what are some things to include in a circuit

Answer 3

a switch(open/closed), battery, lightbulb

Question 4

what is the function of the load?

Answer 4

converts electrical energy into other forms of energy

Question 5

What is the function of the conducting wires

Answer 5

they connect the circuit and allow electrons to flow

Question 6

What is the function of the control device

Answer 6

determines if circuit is closed or open and controls flow of electrons

Question 7

Static electricity

Answer 7

electrons move in 1 place

Question 8

Current electricity

Answer 8

the controlled flow of electrons through a conductor

Question 9

Open circuit

Answer 9

does not allow current to flow

Question 10

Closed circuit

Answer 10

does allow current to flow

Question 11

Direct current

Answer 11

electrons flow in 1 direction

Question 12

Alternating current

Answer 12

electrons flow through alternating directions

Question 13

Conductor

Answer 13

allows electrons to flow easily

Question 14

Insulator

Answer 14

doesn’t allow electrons to flow easily

Question 15

Current

Answer 15

flow of electrons through a conductor(measured in A)
In series the same amt of current goes to all components
In parallel current spilts between paths
I = V/R I = Q/t

Question 16

Voltage

Answer 16

difference in electric potential energy per unit charge measured in 2 different points(measured in V)
In series, cells are connected for more voltage but in parallel, cells run longer
V = I x R

Question 17

Resistance

Answer 17

ability material to oppose the flow of electrical current(r)

R = V/I

Question 18

Are ammeters connected in parallel

Answer 18

No, connected in series to measure current flow through a load

Question 19

What are voltmeters connected through

Answer 19

Parallel, you are measuring difference in voltage across a load

Question 20

What affects resistance

Answer 20

material, temp, length, size

Question 21

Material

Answer 21

some materials are better conductors

Question 22

Size

Answer 22

thicker the wire - less resistance

Question 23

Length

Answer 23

longer length - more resistance

Question 24

Temperature

Answer 24

hotter temp - more resistance

Question 25

Ohms law

Answer 25

potential difference across a load increases, so does the current

Question 26

Series circuit

Answer 26

1 pathway. If part of the circuit is disconnected the rest won’t work. The more light bulbs the less bright

Question 27

Parallel circuit

Answer 27

multiple pathways. If something disconnects circuit still continues. If more lightbulbs are added, the brightness is not affected but the current increases

Question 28

Adding batteries

Answer 28

Series: total voltage id the sum of the voltage of all batteries
Parallel: total voltage is same throughout, they last longer

Question 29

Adding loads

Answer 29

current decreases in series, increases in parallel

resistance increases in series,