Chapter 78

Question 0

In an atom, the electrons:
A) orbit around the nucleus
B) are repelled by the neutrons
C) are attracted to the protons
D) are large in size when compared to the protons
E) orbit only the neutrons

Answer 0

C) are attracted to the protons

Question 1

A basic law of electricity is: unlike charges will attract each other and like charges:
A) repel each other
B) hold each other
C) attract each other
D) are neutralized
E) reduce power output

Answer 1

A) repel each other

Question 2

An open circuit is one in which:
A) a switch is closed
B) the current flows through the resistance
C) the wires are bare
D) a switch is open
E) voltage may exist

Answer 2

D) a switch is open

Question 3

Ohms law can be stated as:
A) E=IR
B) R=I/E
C) I=R/E
D) volts equals ohms divided by amperes
E) watts times ohms equals volts

Answer 3

A) E=IR

Question 4

What power is dissipated by a resistor with a supply voltage of 120 volts and a current of 8 amperes?
A) 960 ohms
B) 15 ohms
C) 15 watts
D) 960 watts
E) 96 kilowatts

Answer 4

D) 960 watts

Question 5

The electrons of an atom are located in _________ that surround the ______ of an atom.

Answer 5

Shells or orbits, nucleus

Question 6

List three devices that are capable of generating an electromotive force (E):

Answer 6

Battery
Generator
Photocell

Question 7

Explain the difference between a single pole switch and a two pole switch.

Answer 7

Single pole switch opens only one side, or one lead, in an electrical circuit; whereas a two pole switch opens both sides, or leads