WorksheetsTony_Chen_12008
Total questions: 9
Worksheet time: 24mins
If a lamp consumes 120 J of energy in one minute, what is its power?
2 watt
4watt
2kwh
4kwh
The resistance of a conductor is 5 Ω, the current through the conduct in 10s has done 200J work. What is the current?
0.2A
4.5A
0.2V
2A
Mr.A's family has an old-style electron iron. When it's connected to a 220V circuit, the current passing through is 4.5 A. What is the electric power of this electric iron?
850watt
990watt
220watt
633watt
Please justify W=VIt.
Please justify Q= I2 Rt
Electrical work DON'T depends on...
Current Passed
Applied Voltage
Frequency
Time
What's gonna happen if resistance increase in the circuit？
Less heat
More current
More heat
When will be heat produced in a circuit?
Whenever there is resistance connected to the circuit.
When there is a conductor.
Whenever an electric current gets passed through the conductor.
Electrical energy is the product of ______ and ______.
power; resistance
current; power
power; time
time; current
