Kwh
Quiz
•
Science
•
9th - 10th Grade
•
Practice Problem
•
Hard
Standards-aligned
Charles Martinez
FREE Resource
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8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The kilowatt-hour is the unit of
electrical charge
electrical energy
electrical power
voltage
Tags
NGSS.HS-PS2-5
NGSS.HS-PS3-5
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1. What is the formula to calculate electrical power?
potential difference / current
potential difference / resistance
potential difference x current
potential difference x resistance
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
An electric heater takes 4A of current from a 250V supply when operating normally.
How long would it take the heater to convert 400 000 J of electrical energy?
40 s
400 s
1000 s
1600 s
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
It costs $0.30 for 1 kWh of electrical energy.
How much will it cost to run a 60 W lamp for 10 hours?
$0.05
$0.18
$3.00
$18.00
Tags
NGSS.HS-PS3-1
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
An electric heater is rated 230V, 10A. Which fuse is most suitable for the electric heater?
10A
15A
30A
13A
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A microwave oven rated 1.2kW, 240V is connected to a 240V electricity supply. Calculate the current that flows through the oven.
5A
0.05A
200A
0.2A
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
An electric rice cooker rated 800W, 230V is switched on for 30 minutes. How much electrical energy is used?
400kWh
3.48kWh
0.4kWh
104kWh
Tags
NGSS.HS-PS3-1
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