Resistors and Circuits

What quantity is the same in each branch of a parallel circuit?

• Voltage drop

• Resistance

• Power

• Current

What happens to the equivalent (total) resistance as resistors are added to a series circuit?

• Total resistance increases

• Total resistance decreases

• Total resistance remains the same

What happens to the equivalent (total) resistance as resistors are added in parallel?

• Total resistance increases

• Total resistance decreases

• Total resistance remains the same

What happens to the current as resistors are added to a series circuit?

• Current increases

• Current decreases

• Current stays the same

What is the voltage drop V₄?

• 5 V

• 10 V

• 15 V

• 25 V

Find the current through a 240 Ω resistor connected to a 120 V source.

• 2 A

• 240 A

• 0.5 A

• 120 A

Find the voltage across a 100 Ω resistor drawing 4 amps of current.

• 25 V

• 400 V

• 0.004 V

• 104 V

Find the equivalent resistance of three 120 Ω resistors wired in parallel.

• 360 Ω

• 120 Ω

• 40 Ω

Find the equivalent resistance of three 120 Ω resistors wired in series.

• 360 Ω

• 120 Ω

• 40 Ω

Which switch would cut off current to R₁ only?

• A

• B

• C

• D

• E