AP Physics 2: Circuit Configurations and Kirchhoff's Laws

Which circuit has the largest power rating?

• a

• b

• c

• d

• e

Which two resistors must have the same current? Select two.

• 1-Ohm

• 2-Ohm

• 3-Ohm

• 4-Ohm

• 6-Ohm

Which two resistors must have the same voltage? Select two.

• 12-Ohm

• 6-Ohm

• 4-Ohm

• 3-Ohm

• 1-Ohm

Answer explanation

In a parallel circuit, resistors share the same voltage. The 6-Ohm and 12-Ohm resistors must have the same voltage across them, as they are connected in parallel, allowing for equal voltage distribution.

Which is true?

• I₁ + I₂ = I₃

• I₂ + I₃ = I₁

• I₃ + I₁ = I₂

• I₁ = I₂ = I₃

Answer explanation

The correct choice is I2 + I3 = I1, indicating that the sum of currents I2 and I3 equals I1, which is a valid relationship in circuit analysis.

Tags

NGSS.HS-PS3-5

What is the internal resistance of the battery in this circuit?

• 0.25 Ω

• 25 Ω

• 0.40 Ω

• 1.3 Ω

What is the reading on the ammeter in this circuit?

• need to know resistances to determine

• 7 A

• 5 A

• 3 A

Which ammeter will have the greatest reading?

• A₁

• A₂

• A₃

• A₄

Which resistor will have the greatest electrical potential difference?

• 20-Ohm

• 30-Ohm

• 40-Ohm

• all the same

What is the voltage drop across the third resistor?

• 1 V

• 6 V

• 9 V

• 15 V

Answer explanation

The voltage drop across a resistor in a series circuit can be calculated using Ohm's Law (V = IR). If the total voltage is divided among the resistors, the third resistor has a drop of 6 V, making it the correct choice.

All of the following are true EXCEPT

• 18 = 3 I₂ + 6 I₁

• 45 = 6 I₁ + 2 I₃

• 27 = -3 I₂ + 3 I₃

• 27 = 3 I₂ + 3 I₃

Answer explanation

The statement '27 = 3 I2 + 3 I3' is incorrect because it does not hold true when substituting values for I2 and I3. The other statements are valid equations.