Electrical Power Review

What is the unit of Electrical Power?

• Joule

• Watt

• Where

• Amp

Tags

NGSS.HS-PS2-5

The unit of energy is?

• Amp

• Joule

• kiloWatt

• Volt

A kilowatt (kW) is how many watts?

• 10

• 50

• 100

• 1000

The unit of electricity is...

• KiloWatt-Hour (kWh)

• Watt

• Joule

• Amp

Calculate the voltage applied when a 60 watt light-bulb uses a current of 5 amps

• 300 volts

• 30 volts

• 12 volts

• 0.08 volts

Tags

NGSS.HS-PS2-5

What is the power of a 20V bulb with 5A through it?

• 100W
• 100V
• 6.3W
• 6.3A

If the hair dryer and the vacuum cleaner are both on, what is the power used?

• 2600 watts
• 400 watts
• 2200 watts
• 1100 watts

Electrical power can be calculated using

• Resistance x Voltage
• Voltage x Current 
• Voltage ÷ Current

a pair of 15-watt computer speakers are connected to a 12-volt power supply. what is the electric current running through the speakers? 

• 1.25 A
• 0.8 A
• 12.5 A
• 180 A

Coffee Pot @

120 V What is the amperage?

• 10 Amps

• 12 Amps

• 10 Watts

• 12 Ohms

Tags

NGSS.HS-PS2-5