Final answer:
The strength of the electric current is measured in amperes (A), or 'Amp'. Ohm's Law states that electric current is inversely proportional to resistance. Current is denoted as 'I' and involves the movement of charge, with one ampere being equal to one coulomb of charge moving per second.
Step-by-step explanation:
The unit that measures the strength of the electric current is the ampere (A), which is commonly abbreviated as 'Amp'. An ampere is defined based on the force between two parallel conductors carrying electric current. Specifically, one ampere is the amount of electric current that produces an attractive force of 2 × 10-7 newton per meter of separation between these two wires.
Ohm's Law is important in understanding the relationship between current, voltage, and resistance. According to Ohm's Law, the current through a resistor is inversely proportional to the resistance if the voltage is held constant. Therefore, if the resistance increases, the current will decrease, and vice versa.
The symbol 'I' is used to denote current, and it is measured in amperes. An alternative way to define an ampere is by the movement of one coulomb of charge per second (1 A = 1 C/s). Understanding these concepts is essential for further study in electric current, resistance, and Ohm's Law within the broader field of electricity and magnetism.