Electrical current is defined by how much electric charge has been transferred per second, giving the following relationship:
Rearranging this we get:
The symbol for charge is , it is measured in coulombs ( ).
The symbol for current is , it is measured in amperes ( ).
The symbol for time is , it is measured in seconds ( ).
This gives the relationship:
Calculate the charge that passes through a lamp in 2 minutes if the current is ?
To calculate the charge, you need to use the following relationship:
Remember to convert minutes into seconds by multiplying by 60