Understanding Series and Parallel Resistors

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Which of the following equations represents Ohm's Law?

• All of the above

If you have three resistors with values of 4 Ω, 6 Ω, and 8 Ω connected in series, what is the total resistance?

• 18 Ω

• 24 Ω

• 12 Ω

• 10 Ω

What is the total resistance of two resistors, 10 Ω and 15 Ω, connected in parallel?

• 25 Ω

• 6 Ω

• 5 Ω

• 4 Ω

A circuit has a total resistance of 20 Ω and a current of 2 A. What is the voltage across the circuit?

• 10 V

• 20 V

• 40 V

• 30 V

Which of the following is a practical application of resistors in electronic devices?

• To increase the current

• To decrease the voltage

• To limit the current

• To store energy

If a 12 V battery is connected to a resistor of 4 Ω, what is the current flowing through the resistor?

• 3 A

• 2 A

• 4 A

• 6 A

In a parallel circuit, if one of the resistors is removed, what happens to the total resistance?

• It increases

• It decreases

• It remains the same

• It becomes zero

Which of the following is true for resistors in series?

• The total resistance is the sum of individual resistances

• The total resistance is less than the smallest resistance

• The total resistance is the product of individual resistances

• The total resistance is the reciprocal of the sum of reciprocals of individual resistances

A 9 V battery is connected to a series circuit with resistors of 3 Ω and 6 Ω. What is the current flowing through the circuit?

• 1 A

• 2 A

• 3 A

• 0.5 A

What is the main advantage of using resistors in parallel in a circuit?

• They increase the total resistance

• They provide multiple paths for current

• They decrease the total voltage

• They store electrical energy