measurement in electric circuits

Question 1

what is the symbol for electric charge?

Answer 1

Q

Question 2

what is the unit for electric charge?

Answer 2

coulomb (C)

Question 3

what is 1C equal to?

Answer 3

the charge of 6.25 x 10 to the power of 18 electrons

Question 4

what is electric current?

Answer 4

the rate of the movement of electric charge in an electric circuit

Question 5

what is the symbol for electric current?

Answer 5

I

Question 6

what is the unit for electric current?

Answer 6

ampere (A)

Question 7

what are the two ways electrons can flow in an electric circuit?

Answer 7

-conventional flow -electron flow

Question 8

what is conventional flow?

Answer 8

the electrons flow from the positive terminal to the negative terminal

Question 9

what is electron flow?

Answer 9

the electrons flow from the negative terminal to the positive terminal

Question 10

which flow is correct, but not widely used?

Answer 10

electron flow (negative => positive)

Question 11

which flow is incorrect but widely accepted?

Answer 11

conventional flow (positive => negative)

Question 12

what is electric current measured with?

Answer 12

an ammeter

Question 13

how does an ammeter work?

Answer 13

it is connected in series to the item you want to measure, which means you put the ammeter in front or behind the item you want to measure

Question 14

what is the symbol for an ammeter?

Answer 14

Question 15

how fast do electrons move?

Answer 15

less than 0.01 cm/s

Question 16

why does electric equipment turn on immediately?

Answer 16

the whole circuit is full of electrons and any push by an electron from the power source will push every electron in the path

Question 17

what is potential difference/ voltage?

Answer 17

the difference in electrical potential energy when a charge moved between two points in an electric circuit

Question 18

what is the symbol for voltage?

Answer 18

V

Question 19

what is the unit for voltage?

Answer 19

volts (V)

Question 20

what is 1V equal to?

Answer 20

1J of energy per 1C or charge (each coulomb of charge have 1J unit of energy)

Question 21

what is voltage measured with?

Answer 21

a voltmeter

Question 22

how does a voltmeter work?

Answer 22

it is connected in parallel to the item you want to measure, which means you create a new path for the voltmeter next to the item you want to measure

Question 23

what is the symbol for a voltmeter?

Answer 23

Question 24

what is electric resistance?

Answer 24

the opposition to the flow of electric current in a material. this is a property of the material

Question 25

what is the symbol for electric resistance?

Answer 25

R

Question 26

what is the unit for resistance?

Answer 26

Ohm (Ω)

Question 27

does a conductor have low or high resistance?

Answer 27

low

Question 28

does an insulator have low or high resistance?

Answer 28

high

Question 29

what is resistance measured with?

Answer 29

an ohmmeter

Question 30

how does an ohmmeter work?

Answer 30

it is connected in parallel to the item you want to measure, which means you create a new path for the ohmmeter next to the item you want to measure

Question 31

what is the symbol for an ohmmeter?

Answer 31