POE Fuel Cells

Where does the hydrogen and oxygen come from in your fuel cell?

• water
• solar panel
• hydrogen peroxide
• the air

What is the term used to separate water into hydrogen and oxygen using electricity?

• hydrolysis
• electrolysis
• electricity
• hydroelectricity

When water is separated into hydrogen and oxygen, which gas is there more of?

• Hydrogen
• Oxygen
• both are produced in same quantity

Find total resistance
total current
and the voltage through resistor 3

• 60 Ohms, 0.4 A, 8 V
• 60 Ohms, 2.5 A, 8 V
• 90 Ohms, 2.5 A, 24 V
• 60 Ohms, 0.4 A, 24 V

The current going through the 180 ohm resistor is 

• 0.05 amps
• 0.2 amps
• 0.1 amps
• 20 amps

The equivalent resistance of this circuit is 

• 25.7 ohms
• 315 ohms
• 324 ohms
• 90 ohms

What equation is used to calculate the power of an electrical system?

• P = W/t
• P = IV
• P=IR
• P=I/V

What unit is used to measure current?

• Amperes
• Ohms
• Volts
• Watts

What unit is used to measure resistance?

• Ohms
• Amperes
• Volts
• Watts

How many volts does a AA battery supply?

• 9V
• 20V
• 1.5V
• 3V