Electricity and Ohm's Law

Electricity and Ohm's Law

Visualizing Current

• The negative terminal of a battery has tons of electrons.

• When forced, they leave, complete the circuit, and return to the positive terminal.

• Resistors slow them down.

V = Voltage / I = Current / R = Resistance

Multiple Choice

The plastic covering is there to:

• Provide a conductor for electrical energy to flow.

• Provide an insulator so that electrical energy will not pass outside of the wires.

• Provide a conductor so that electrical energy can NOT flow.

• Provide an insulator so that electrical energy can flow.

Multiple Choice

Electricity that flows in a closed path is called a

• battery

• current

• circuit

• resistor

Multiple Choice

What is Resistance?

• The flow of electrons

• Electric potential difference

• A power source

• The ability to reduce the flow of electrons

Multiple Choice

The mathematical relationship among Voltage, Current, and Resistance

• Faraday's Law
• Tesla's Law
• Edison's Law
• Ohm's Law

Multiple Choice

Current times Resistance (I X R) equals

• Power

• Voltage

• Amperage

• Ohm

Multiple Choice

Voltage divided by Resistance (V / R) equals

• Current

• Power

• Ohms

• Watts

Multiple Choice

What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?

• 25 V

• 10 V

• 2.5 V

• 0.4 V