Circuits

The picture shows an electrical circuit. This circuit is a series circuit because:

• It has 3 light bulbs.

• The same current flows through all three light bulbs.

• It uses a single battery.

• The electrical current has more than one path to flow through

How many lightbulbs will work if there is a break in the circuit at POINT A?

• 1

• 2

• 3

• NONE

If the current through the battery was 10A in this diagram. What would the current through each bulb be?

• 10A
• 5A
• 20A
• 0A

The equivalent resistance in this circuit is

• 100 ohms

• 450 ohms

• 400 ohms

• 30 ohms

The current going through the 90 ohm resistor is

• 10 amps

• 0.1 amps

• 0.2 amps

This circuit won't work. What essential part is missing from this circuit?

• resistance
• source of electric current
• conductor
• ammeter

this is the symbol for a _____?

• switch
• light 
• battery
• wires

A 2.0-ohm resistor and a 4.0-ohm resistor are connected in series with a 12-volt battery. If the current through the 2.0-ohm resistor is 2.0 amperes, the current through the 4.0-ohm resistor is

• 1.0 A

• 2.0 A

• 3.0 A

• 4.0 A

The total current through this circuit is

• 0.02 amps

• 0.09 amps

• 50 amps

• 9 amps

The voltage dropped across the 300 ohm resistor is

• 6 V

• 9 V

• 2 V

• 30 V