Ohm’s Law in Series Circuits – Multiple Choice Questions

What is the current in a series circuit with a total resistance of 10 Ω and a voltage supply of 20 V?

• 2 A

• 0.5 A

• 10 A

• 30 A

If the total voltage is 12 V and the current is 3 A, what is the total resistance?

• 36 Ω

• 4 Ω

• 9 Ω

• 15 Ω

What is the voltage across a 5 Ω resistor if the current is 2 A?

• 2.5 V

• 10 V

• 5 V

• 1 V

Three resistors in series (2 Ω, 3 Ω, and 5 Ω) are connected to a 10 V supply. What is the total current?

• 2 A

• 1 A

• 0.5 A

• 0.8 A

If current in a series circuit is 0.5 A and the resistance is 8 Ω, what is the voltage?

A 9 V battery powers a series circuit with 3 resistors: 1 Ω, 2 Ω, and 4 Ω. What is the total current?

• 1.3 A

• 3 A

• 0.5 A

• 2 A

What happens to the current in a series circuit if the resistance increases?

• It increases

• It decreases

• It stays the same

• It becomes infinite

If the total current is 2 A and one resistor is 6 Ω, what is the voltage drop across it?

• 12 V

• 3 V

• 1 V

• 8 V

Which of the following is Ohm’s Law?

• I = R × V

• R = V × I

• V = I × R

• V = R ÷ I

In a series circuit with a total resistance of 15 Ω and a current of 0.2 A, what is the total voltage?

• 3 V

• 1.5 V

• 30 V

• 15 V