Series Circuits Quiz

What is the Kirchhoff's Voltage Law used for in series circuits?

• To calculate the individual voltage drops across individual loads

• To find the circuit's current

• To calculate the total resistance of the circuit

• To find the total power dissipated by the circuit

What is the total resistance (Req) in a series circuit with resistances of 2K, 4K, and 6K?

• 8K

• 10K

• 12K

• 14K

Answer explanation

Req = R1 + R2 + R3

What is the circuit's current (Is) in a series circuit with a total voltage of 24V and total resistance of 12K?

• 3mA

• 4mA

• 1mA

• 2mA

What is the voltage for each load in a series circuit with a current of 2mA and resistances of 2K, 4K, and 6K?

• 2V, 4V, 6V

• 4V, 8V, 12V

• 6V, 12V, 18V

• 8V, 16V, 24V

What is the total power dissipated by the circuit in a series circuit with a current of 2mA and total voltage of 24V?

• 56mW

• 40mW

• 48mW

• 32mW

Answer explanation

Per Watt's Law : Pt = Vs x Is

In a series circuit, what happens to the voltage across each load as the resistance of the load increases?

• Decreases

• Becomes zero

• Remains the same

• Increases

Answer explanation

Voltage in a load is directly proportional to the load's resistance

Calculate the Req of a series circuit with 3 resistors, when the cells (batteries) provide 35V and the the current flowing is 0.25A

• 140Ω

• 8.75Ω

• 105Ω

• The Req can't be calculated because we don't have the individual resistor values.

Answer explanation

Per Ohm's law: Req = Vs / Is

How much voltage would a technician expect to measure across a 15 ohm lamp and a 22 ohm lamp connected in series with a current flow of 100mA through the 15 ohm lamp?

• 5.4V

• 3.6V

• 2.7V

• 3.7V

If the total power used by a 200Ω and 800Ω resistor connected in series is 40W, what is the voltage drop across the 800Ω resistor?

• 40V

• 160V

• 200V

• 240V

What is the definition of a series circuit?

• The total power dissipated by the circuit is simply the sum of the power dissipated by each component

• The total resistance is the sum of the individual resistances of each component

• The current is the same through every component

• The sum of all the voltages in a circuit equals zero