Understanding Ohm's Law and Circuits

Based on the graph, which of the following would be true regarding the relationship of voltage and current?

• As voltage increases, current decreases.

• Voltage will not affect current.

• As voltage decreases, current increases.

• As voltage increases, current also increases.

What is Ohm's Law?

In a series circuit, how does the total resistance compare to the individual resistances?

• The total resistance is the sum of the individual resistances.

• The total resistance is the product of the individual resistances.

• The total resistance is the average of the individual resistances.

• The total resistance is the difference between the largest and smallest resistances.

In a parallel circuit, how does the total current compare to the individual branch currents?

• The total current is the sum of the branch currents.

• The total current is the product of the branch currents.

• The total current is the average of the branch currents.

• The total current is the difference between the largest and smallest branch currents.

If a circuit has a voltage of 12 volts and a resistance of 4 ohms, what is the current flowing through the circuit?

• 2 amperes

• 3 amperes

• 4 amperes

• 6 amperes

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

• It increases.

• It decreases.

• It remains the same.

• It doubles.

In a series circuit with a 9-volt battery and three resistors of 2 ohms each, what is the total current?

• 0.5 amperes

• 1.5 amperes

• 3 amperes

• 4.5 amperes

Which of the following statements is true about voltage in a parallel circuit?

• The voltage is the same across each component.

• The voltage is different across each component.

• The voltage is zero across each component.

• The voltage is the sum of the voltages across each component.

If a circuit has a current of 2 amperes and a resistance of 5 ohms, what is the voltage across the circuit?

• 5 volts

• 7 volts

• 10 volts

• 12 volts

In a series circuit, if one component fails, what happens to the circuit?

• The entire circuit stops working.

• The circuit continues to work with reduced efficiency.

• The circuit continues to work with increased efficiency.

• The circuit continues to work without any change.