WorksheetsBL PHYG9 - Chapter 15 Test
Total questions: 20
Worksheet time: 35mins
What is an alternate formula for Joule’s Law?
V = IR
W = VIT
Q = Rv2 t
P = VI
What is the formula for Electrical power?
Q = I2 Rt
I = V/R
P = VI
None of these
A dangerous condition when you make electrical contact with a conductor which may cause shock or injury.
Electrical hazard
Fuse
Electric shock
Circuit Breaker
A wire that has a high potential. Is also called hot wire or phase wire
Neutral Wire
Live Wire
Ground Wire
Circuit Breaker
When you draw more electricity than what a circuit can handle
Overheating
Electrical Power
Circuit Overload
Short Circuit
When a live wire and the neutral wire come into direct contact, due to damage of insulation of live wire.
Short Circuiting
Overheating
Circuit Overload
None of these
The magnitude of electrical work depends on:
Current
Time
Voltage
All of these
An electric tester is used to measure:
Hot wire
Resistance
Voltage
Current
Look at the plug. The top plug is connected to the:
Ground Wire /Earth Wire
Neutral Wire
All of these
Live wire/hot wire
You use a 1500 Watt hair heater for 3 hours. How many kilowatt-hours of electricity did you use?
4.5 Joules
4.5 kWh
4500 kWh
3 kWh
Write down the number and its matching letter.
Air cooling uses water as a heat conductor.
True
False
Neutral wire provides an alternative path for the current to flow
True
False
Electrical Power is the product of voltage and current
True
False
We can use an electric tester to measure the amount of electricity we use in our houses
True
False
What is air cooling? Name 2 types of air cooling.
Your oven has a power rating of 5000 watts.
a. If the oven is used for 2 hours to bake cookies, how many kilowatt-hours (kWh) are used?
b. If your town charges 4 RMB per kWh, what is the cost to use the oven to bake the cookies?
The specification of a household electric heater is “250V, 1000W.
a. What is the resistance of the internal heating wire when this kind of electric heater works normally?
b. How much Joule heat is produced when working for 10 minutes at the rated voltage?
What are the common types of electric shock
List the common components of the home circuit
