PHYSICS- Properties of Electrical Circuits

Which of the following correctly states relationship between voltage, resistance, and current in a circuit?

• Current is directly related to voltage but inversely related to resistance.

• Current is directly related to both voltage and resistance.

• Current is inversely related to both voltage and resistance.

• Current is directly related to voltage but is not affected by resistance.

Which best describes a parallel circuit?

• Electricity flows along one pathway.
• The flow of electricity comes from one source. 
• Electricity flows along more than one pathway. 
• The flow of electricity comes from more than one source. 

A circuit has a source voltage of 50V and a current of 10A. What is the power in watts?

• 100
• 250
• 500
• 1,500

If a circuit has 12 amps of current and the resistance is 20 ohms, the applied voltage is _____.

• 120V
• 240V
• 270V
• 380V

How many amps are there in the current of a circuit if the voltage source is 140V and the resistance is 2 ohms?

• 12A
• 70A
• 160A
• 280A

Tags

NGSS.HS-PS3-5

Which of the following is used to step voltage down to lower levels before it reaches a home or office?

• a. Transformer
• b. Generator
• c. Conductor
• d. Insulator

A 5-ohm and a 20-ohm resistor are connected in parallel. What is the total resistance of these two resistors?

• a. 100 ohms
• b. 25 ohms
• c. 4 ohms
• d. 2 ohms

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

• 3 kΩ

• 10 kΩ

• 13 kΩ

• 18 kΩ

Which resistor will prevent the most current flow?

• 1 ohm
• 100 ohms
• 1000 ohms
• 0.5k ohms

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