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WorksheetsPower and energy exit slip
Total questions: 15
Worksheet time: 18mins
How much energy does a 100 W electric bulb transfer in 1
minute (60 s) ?
100 J
600 J
3600 J
6000 J
Calculate the energy used by a coffee maker that has a power rating of 0.900 kW and operated for 17 hours.
15.3 kwh
17.3 kwh
900 kwh
1200 kw
A 120 V - 20 A circuit breaker max power rating
The unit of energy is?
Amp
Joule
kiloWatt
Volt
The ability to do work or cause change:
work
energy
momentum
power
CHALLENGE: 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
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
A kilowatt (kW) is how many watts?
10
50
100
1000
A current of 5A flows in a heating elements for 10 minutes. If the potential difference across the elements is 240 V, calculate the electrical energy is used by the elements
12kJ
7.2 kJ
720 kJ
2.4kJ
The kilowatt - hour is a unit of
Energy
power
Charge
Voltage
A bulb is labelled 6 V, 0.6 A. What is the power of the bulb?
0.6 W
5W
3.6W
6W
