Current, Resistance, and Potential Difference

Question 1

electrons not bound tightly to atoms

Answer 1

free electrons

Question 2

The result when many free electrons move in the same direction.

Answer 2

Electric current

Question 3

a material having many free electrons that can move easily

Answer 3

electrical conductor

Question 4

a material having few free electrons that cannot move freely

Answer 4

electrical insulator

Question 5

opposition to the movement of free electrons

Answer 5

resistance

Question 6

different in potential energy per unit of charge between two points

Answer 6

potential difference

Question 7

decrease in potential difference across part of a path

Answer 7

voltage drop

Question 8

the amount of charge is measured in ______, and the time is measured in _______.

Answer 8

coulombs

seconds

Question 9

a rate of flow of one coulomb per second is called one ____.

Answer 9

amperes

Question 10

in the metric system, potential energy is measured in.

Answer 10

joules

Question 11

1 volt= ——————-

Answer 11

one joule of potential energy

coulomb of charge

Question 12

resistance is a property of the _______, its ______, and its ______.

Answer 12

material
size
temperature

Question 13

the most common electrical conductors in the planet are made of ________ and ______.

Answer 13

metals

carbon

Question 14

what happens to the current between two points if the potential difference between them is decreased to zero?

Answer 14

it stops

Question 15

the proportional relationship between potential difference and current is called

Answer 15

Ohm’s Law

Question 16

the meter used for the measuring potential differences called a

Answer 16

voltmeter

Question 17

resistance is measured in unit called

Answer 17

Ohms

Question 18

what instrument is used for measuring current

Answer 18

ammeter

Question 19

to maintain a current between two points, you must maintain the

Answer 19

potential difference