AP Physics LC Circuits

What is the total resistance of the circuit?

• 80 ohms
• 45 ohms
• 50 ohms
• 75 ohms

What is the current through the 45 ohm resistor?

• .067 Amps
• 3 Amps
• .05 Amps
• .67 Amps

A 9.0 V battery and two resistors are connected in a the circuit shown above. The current through the 3.0 Ω resistor is 2.0 A. What is the potential difference across resistor R₂?

• 9.0 V

• 6.0 V

• 3.0 V

• 1.5 V

The above table shows the potential difference and current for each circuit element in a circuit consisting of a battery and three resistors. Which of the following diagrams could represent the circuit?

• 
• 
• 
• 

Select two answers.

• Between points b and e only

• Between points a and f and between points b and c

• Between points b and c and between points c and d

• Between points a and f and between points b and e

A circuit is designed with two resistors, R₁ = 200 Ω and R₂ = 400 Ω, as shown above. What is the relationship between the three labeled currents?

• I₁ + I₂ = I

• I > I₁ > I₂

• I₂ > I₁ > I

• I₁ = I₂ = I

When the circuit shown above is set up, the potential difference across the battery is 3.0 V. By how much will the magnitude of the potential difference across R₂ change when R₃ is removed and its branch is left open?

• The magnitude of the potential difference across R₂ does not change.

• The magnitude of the potential difference across R₂ decreases by 0.5 V.

• The magnitude of the potential difference across R₂ increases by 0.5 V.

• The magnitude of the potential difference across R₂ increases by 1.0 V.

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

Tags

NGSS.MS-PS2-3

Four identical light bulbs K, L, M, and N, are connected in the circuit above. Which option correctly ranks the current through the bulbs?

• L = M > K = N

• L > M > K > N

• N > K > L = M

• N > L = M > K

Four identical light bulbs K, L, M, and N, are connected in the circuit above. Bulb K burns out. What happens?

• All bulbs will go out.

• Bulb N becomes brighter.

• The brightness of bulb N remains the same.

• Bulb N becomes dimmer but doesn't go out.