Unit 7 - Electricity

Electric current flows from

• detect electric current

• negative terminal to positive terminal

• positive terminal to negative terminal

• the flow rate of electric charges through a conductor

Electric current is defined as

• detect electric current

• negative terminal to positive terminal

• positive terminal to negative terminal

• the flow rate of electric charges through a conductor

Electrons flows from

• detect electric current

• negative terminal to positive terminal

• positive terminal to negative terminal

• the flow rate of electric charges through a conductor

What is voltage measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

What is current measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

What is resistance measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

How do you calculate voltage?

• Current X Resistance
• Resistance ÷ Current
• Current ÷ Resistance
• Measure it with a ruler

How do you calculate current

• Resistance X Voltage
• Voltage X Resistance
• Resistance ÷ Voltage
• Voltage ÷ Resistance

How do you calculate resistance?

• Voltage X Current
• Current ÷ Voltage
• Voltage ÷ Current
• Current X Amps

What voltage is needed to cause a 2A current flow through a 10Ω resistor?

• 5V
• 0.2V
• 20V
• 200V