Physics Unit 14 Review: Circuits

What is current measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

What is resistance measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

Calculate current if a charge of 10 Coulombs flows past a point in 5 seconds

• 2 Amps

• 50 Amps

• 0.5 Amps

A lamp plugged into a standard american outlet (120 V) uses 0.8 A of current. What is the power in the circuit?

• 0.007 W

• 96 W

• 120 W

• 150 W

Calculate the electric power of an electrical appliance in which 10 A of current is flowing through a resistor of 2 ohms.
 
Remember: V=IR and P=VI

• 80 W
• 200 W
• 2.5 A
• 22.5 KJ

What is the equivalent or total resistance (R_e) across this circuit?

• 3 kΩ

• 10 kΩ

• 13 kΩ

• 18 kΩ

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 is divided between the three light bulbs.

In a parallel circuit which of the following is the same value throughout the circuit?

• Voltage
• Current
• Resistance
• Charge

Does this diagram represent a series or parallel circuit?

• series circuit
• parallel circuit

How would the equivalent resistance be determined?

• 1 / Req = (1/5) + (1/8) + (1/3) Ω

• 120 Ω

• 1.5189873 Ω

• 1 / Req = (1/5) * (1/8) * (1/3) Ω