Kirchhoff's Laws and Circuits

Assume that the voltage of the battery is 9 V and that the three resistors are identical. What is the Voltage drop across each resistor?

• 12 V

• 0 V

• 3 V

• 4 V

In the circuit below, what is the voltage drop across R1?

• 12 V

• 6 V

• 8 V

• 4 V

What is the current through R1?

• 10 A

• 5 A

• 7 A

• 2 A

Points P and Q are connected to a battery of fixed voltage. As more resistors R are added to the parallel circuit, what happens to the total current in the circuit?

• increases

• remains the same

• decreases

• drops to zero

The lightbulbs in the circuit below are identical with the same resistance R. Which circuit produces more light? (brightness ÜÞ power)

• circuit 1

• circuit 2

• both the same

• it depends on R

What happens to the voltage across the resistor R1 when the switch is closed? The voltage will:

• increases

• decreases

• remains the same

This is an example of a _______ circuit

• open
• series
• parallel
• square

This is an example of a ______ circuit

• Series
• Parallel
• Open
• Dihexihedral

The total resistance in this circuit is 

• 100 ohms
• 450 ohms
• 400 ohms
• 30 ohms

The total current through this circuit is

• 0.02 amps
• 0.09 amps
• 50 amps
• 9 amps