Circuit - Series and Parallel

Which best describes a series circuit? 

• It has two light bulbs. 
• The same current flows through both light bulbs. 
• It uses a single battery.
• The current is divided between the light bulbs. 

What is one problem with using a series circuit? 

• It has a lot of series. 
• If one goes down, they all go down! 
• It doesn't work properly.
• There are no problems. 

What is one benefits of using a parallel circuit?  

• It gets confusing.
• There are no problems.
• If one goes down, it does not affect the others. 
• Porque es para llelio. 

Which one uses less wire? 

• Parallel circuit 
• Series Circuit 

A circuit with 3 resistors, 10 Ohms, 30 Ohms and 20 Ohms are in series. What is the total resistance

• 30 Ohms
• 50 Ohms
• 60 Ohms
• 100 Ohms

The total current through this circuit is

• 0.02 amps
• 0.09 amps
• 50 amps
• 9 amps

Total resistance in a series circuit

• R_{t =} R₁ + R₂ + R₃ ...
• 1/R_{t =} 1/R₁ + 1/R_{2 ...}
• R_t = R₁ X R₂ / R₁ + R_{2 ...}
• R_t = R_N / R_V 

Total resistance in a parallel circuit

• R_{t =} R₁ + R₂ + R₃ ...
• 1/R_{t =} 1/R₁ + 1/R_{2 ...}
• R_t = R₁ X R₂ / R₁ + R_{2 ...}
• R_t = R_N / R_V 

The voltage drop across the 180 ohm resistor is 

• 9 V
• 6 V
• 2 V
• 12 V

The current going through the 45 ohm resistor is 

• 0.05 amps
• 0.2 amps
• 0.1 amps
• 5 amps

Tags

NGSS.MS-PS2-3