ELEMENTS OF POWER

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

Watts is the same as...

• Joules per second
• Voltage per second
• Current per second

The voltage supplied to a circuit is 17 V and the current running through is 10 A. What is the power generated?

• 170 W
• 170 A
• 1.7 V
• 1.7 W

What is the unit of Electrical Power?

• Joule

• Watt

• Where

• Amp

The unit of energy is?

• Amp

• Joule

• kiloWatt

• Volt

A kilowatt (kW) is how many watts?

• 10

• 50

• 100

• 1000

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

What is the power in Watts of a 20V bulb with 5A of current flowing through it?

• 100W
• 100V
• 6.3W
• 6.3A

 A 120 Vac - 20 A  circuit breaker max power rating

• 240 watts
• 24 watts
• 2400 watts
• 240 volts