Effects of an electric current and domestic currents Flashcards
1
Q
Three effects of an electric current and demonstration
A
Heating effect , electric coil in water with thermometer
Magnetic effect , electromagnet connected to electricity
Chemical effect , Volta meter
2
Q
Joules law
A
The rate at which heat is produced in a conductor is proportional to the square of the current , provided its resistant is constant
P=I^2R
3
Q
One kilowatt hour
A
The amount of energy used by a 1000 watt appliance in one hour
4
Q
Watt
A
Joules per second
5
Q
A
