Electrical Power

What is the unit of Electrical Power?

• Joule

• Watt

• Where

• Amp

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

What is the unit of power in electrical systems?

• Joule

• Watt

• Volt

• Ampere

 A 120 Vac - 20 A  circuit breaker max power rating

• 240 watts

• 24 watts

• 2400 watts

• 240 volts

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

Calculate the electric power of an electrical appliance in which 10 A of current is flowing through a resistor of 2 ohms.
 
Remember: V=IR and P=VI

• 80 W

• 200 W

• 2.5 A

• 22.5 KJ

If an oven has a power of 2000 W and the voltage is 230 V what fuse is required?

• 3A

• 5A

• 13A

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

• 100W

• 100V

• 6.3W

• 6.3A

Tags

NGSS.HS-PS2-5

Your oven has a power of 5000 watts. How many kilowatts is this?