AP Physics 2: Circuit Configurations and Kirchhoff's Laws

What is the significance of a short circuit in a circuit?

• A short circuit occurs when there is a low-resistance connection between two points in a circuit, which can lead to excessive current flow and potential damage.

• A short circuit is a method to increase the resistance in a circuit for better performance.

• A short circuit is used to reduce the voltage across components in a circuit.

• A short circuit is a safety feature that prevents current from flowing through the circuit.

What happens to the total resistance when resistors are added in parallel?

• The total resistance increases.

• The total resistance remains the same.

• The total resistance decreases when resistors are added in parallel.

• The total resistance becomes infinite.

What is the relationship between current, voltage, and resistance in a circuit?

• Ohm's Law states that V = I * R, where V is voltage, I is current, and R is resistance.

• Ohm's Law states that I = V / R, where I is current, V is voltage, and R is resistance.

• Ohm's Law states that R = V + I, where R is resistance, V is voltage, and I is current.

• Ohm's Law states that V = I + R, where V is voltage, I is current, and R is resistance.

How do you find the current through a resistor if the voltage across it is 12 V and its resistance is 3 Ω?

• 2 A

• 3 A

• 4 A

• 5 A

If the current through a resistor is doubled, what happens to the voltage across it?

• The voltage remains the same.

• The voltage decreases by half.

• The voltage doubles.

• The voltage quadruples.

What is the unit of resistance?

• volt (V)

• ampere (A)

• ohm (Ω)

• watt (W)

How do you calculate the equivalent resistance of three resistors in parallel: 2 Ω, 3 Ω, and 6 Ω?

• 1 Ω

• 2 Ω

• 3 Ω

• 4 Ω

What happens to the total resistance when resistors are added in series?

• The total resistance decreases.

• The total resistance remains the same.

• The total resistance increases when resistors are added in series.

• The total resistance becomes zero.

In a parallel circuit, what remains constant across all components?

• Current remains constant across all components.

• Voltage remains constant across all components.

• Resistance remains constant across all components.

• Power remains constant across all components.

What is Kirchhoff's Current Law (KCL)?

• The total voltage in a closed circuit is equal to the sum of the individual voltages.

• The total current entering a junction must equal the total current leaving the junction.

• The resistance in a circuit is directly proportional to the current flowing through it.

• The power consumed in a circuit is equal to the product of voltage and current.