Electricity IPC

Which value best represents the resistance of a toaster that draws 12 amps of electricity on a 120 volt line?

• 0.1 Ohms

• 132 Ohms

• 10 Ohms

• 1440 Ohms

What is the current in a copper wire that has a resistance of 2 ohms and is connected to a 9-volt electrical source?

• 4.5 amps

• .22 amps

• 11.0 amps

• 18.0 amps

How much current is flowing through the pictured circuit?

• 12.5 amps

• .4.0 amps

• 3.1 amps

• 0.32 amps

Which circuit is built so that if one light goes out, the other three bulbs will continue to glow

• A

• B

• C

• D

Why are most household circuits parallel rather than series?

• Parallel circuits carry less current than series circuits

• Parallel circuits allow some lights to be used when others are off

• Parallel circuits don't require fuses

• Parallel circuits are easier to build

Which switch if opened, will cause the light bulb to stop glowing?

• T

• S

• Q

• R

Removal of which lightbulb will interrupt the circuit and cause all the other bulbs to fail to glow?

• Lightbulb T

• Lightbulb S

• Lightbulb R

• Lightbulb Q

Copper is a good electrical conductor and used in electric circuits because-

• electrons flow readily through the metal

• no electrons flowing through the metal

• it has a high melting point

• it is a good insulator

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

A 100-watt lightbulb is lighted by a 100-volt power source. Which value represents the current flowing through the bulb?

• 10000 amperes

• 200 amperes

• 1 ampere

• 100 amperes

The picture shows an incomplete circuit. To complete this as a series circuit in which both lighbulbs will glow, a wire must connect these points:

• Q & S

• R & S

• Q & T

• R & T