Unit 2 (Part 2)_Ohm's Law & Series vs. Parallel Circuits

Voltage is measured in ___.

• Ω (Ohms)

• V (Volts)

• A (Amps)

• W (Watts)

Resistance is measured in ___.

• Ω (Ohms)

• V (Volts)

• A (Amps)

• W (Watts)

Current is measured in ___.

• Ω (Ohms)

• V (Volts)

• A (Amps)

• W (Watts)

How many Volts would be required to push 1 Amp through a resistor that has a resistance of 1 Ohm?

Equations:

Voltage = Current x Resistance

Resistance = Voltage ÷ Current

Current = Voltage ÷ Resistance

• 10 volts

• 1 volt

• 48 volts

• 5 volts

What size resistor would produce 3 Amps of current if a 12 Volt battery is used?

Equations:

Voltage = Current x Resistance

Resistance = Voltage ÷ Current

Current = Voltage ÷ Resistance

• 1 Ohm

• 3 Ohms

• 4 Ohms

• 12 Ohms

This circuit has a 24 volt battery and the resistor is 8 Ohms. How many Amps are running through the circuit?

Equations:

Voltage = Current x Resistance

Resistance = Voltage ÷ Current

Current = Voltage ÷ Resistance

• 3 Amps

• 192 Amps

• 2 Amps

• 4 Amps

What is the voltage of a circuit that has a resistance of 5 Ω and a current of 2 Amps?

Equations:

Voltage = Current x Resistance

Resistance = Voltage ÷ Current

Current = Voltage ÷ Resistance

• 25 V

• 10 V

• 2.5 V

• 0.4 V

Use what you learned from the Ohm's Law Lab in order to answer this question: A resistor was used as part of a circuit. Pictures of the ammeter and voltmeter that were used to collect data are provided. Determine the reading for the black line on each meter and then calculate the resistance of the resistor.

Equations:

Voltage = Current x Resistance

Resistance = Voltage ÷ Current

Current = Voltage ÷ Resistance

Hint: ___mA ÷ 1000 = ___A

• 0.052 Ohms

• 0.092 Ohms

• 2.24 Ohms

• 52.4 Ohms

The flow of electricity requires a __________.

• complete path

• incomplete path

• insulated current

• complex circuit

To complete a circuit, the switch must be ___.

• unattached

• open

• closed

• It depends