Ohm's Law and Circuits

What unit is used to measure voltage?

• Ohms

• Omega

• Volts

• Amps

What unit is used to measure current?

• Ohms

• Omega

• Volts

• Amps

What unit is used to measure resistance?

• Ohms

• Omega

• Volts

• Amps

Which is the right form of Ohm's Law?

• V=I/R

• V=R/I

• I=V/R

• I=R/V

What is not needed in order to create a working circuit?

• battery (power source)

• lightbulb

• current

• closed circuit

What is the voltage of a circuit with 4 ohms of resistance and 3 amps of current?

• 12 V

• 21 V

• 4/3 V

• 3/4 V

What is the current in a circuit with 6 ohms of resistance and a battery containing 24 Volts?

• 1/4 A

• 144 A

• 4 A

• 0.4 A

What is the resistance of a lightbulb that experiences 9 Volts and 3 amps of current?

• 1/3 ohms

• 3 ohms

• 27 ohms

• 9 ohms

If all of the switches were closed, how many paths can the current take?

• 4

• 6

• 8

• 10

If switch 1 and 2 were open, which device(s) would turn on?

• none

• A and B

• C, D, E, F, G

• all of them