Module 1

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

difference 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

Electrons not bound tightly to an atom are called_____.

Answer 8

Free electrons

Question 9

The most common electrical conductors in the plant are made of _____ or _____.

Answer 9

Metals; Carbon

Question 10

Electric current is defined as the amount of _____ moving past a given point in a(n) _____.

Answer 10

Electric charge; Unit of time

Question 11

A rate of flow of 1 coulomb per second is called 1 _____.

Answer 11

Ampere (A)

Question 12

Resistance is a property of a(n) _____, its _____, and its _____.

Answer 12

Material, size, temperature

Question 13

Potential difference is the difference in _____, per unit of _____, between two points.

Answer 13

Potential energy; Charge

Question 14

A potential difference of 1 joule per coulomb is called 1 _____.

Answer 14

Volt

Question 15

What happens to the current between two points if the potential difference between them decreases to zero?

Answer 15

It stops

Question 16

What is the name for the proportional relationship between potential difference and current?

Answer 16

Ohm’s Law

Question 17

Resistance is measured in units called _____.

Answer 17

Ohms

Question 18

What determines the potential difference from one end of a conductive path to the other?

Answer 18

What they are connected to

Question 19

The common name for a decrease in potential difference is _____.

Answer 19

Voltage drop

Question 20

What instrument is used for measuring current?

Answer 20

Ammeter

Question 21

In an ammeter, most of the current goes around the meter movement through a special resistor, called the _____.

Answer 21

Shunt

Question 22

What instrument is used for measuring potential difference?

Answer 22

Voltmeter

Question 23

To calculate resistance, you divide the _____ by the _____.

Answer 23

Potential difference; Current