Current and Voltage

What is Current?

• A stream or flow of electrons in one direction.

• The difference in electrical pressure.

• Measures how the material reduces the flow of current.

• A path in which electrons flow.

What is Voltage?

• A stream or flow of electrons in one direction.

• The difference in electrical pressure.

• Measures how the material reduces the flow of current.

• A path in which electrons flow.

What is Resistance?

• A stream or flow of electrons in one direction.

• The difference in electrical pressure.

• Measures how the material reduces the flow of current.

• A path in which electrons flow.

What is Circuit?

• A stream or flow of electrons in one direction.

• The difference in electrical pressure.

• Measures how the material reduces the flow of current.

• A path in which electrons flow.

Circuit is measure in ________?

• Volts

• Ohms

• Amperes

Voltage is measure in ________?

• Volts

• Ohms

• Amperes

Current is measure in ________?

• Volts

• Ohms

• Amperes

Find the current I through a resistor of resistance R = 9 Ω if the voltage across the resistor is 36 V.

• 75

• 13

• 20

• 4

A small light bulb is connected to a 52V battery and draws 4A of current. What is the resistance of the bulb?

• 75

• 13

• 20

• 4

A motor with an operating resistance of 15Ω is connected to a voltage source. The current in the circuit is 5A. What is the voltage of the source?

• 75

• 13

• 20

• 4