Electric current refers to the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit. It is measured in amperes (A). The larger the value in amperes, the more electricity is flowing in the circuit.   Ohm's Law: Voltage is needed for electric current to flow, and greater voltage results in more current. Resistance opposes the flow of electric current, and greater resistance results in less current. These relationships among voltage, resistance, and current were first demonstrated by a German scientist named Georg Ohm in the early 1800s, so... Show more

Electric current refers to the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit. It is measured in amperes (A). The larger the value in amperes, the more electricity is flowing in the circuit.
 

Ohm's Law: Voltage is needed for electric current to flow, and greater voltage results in more current. Resistance opposes the flow of electric current, and greater resistance results in less current. These relationships among voltage, resistance, and current were first demonstrated by a German scientist named Georg Ohm in the early 1800s, so they are referred to as Ohm's law.

Ohm's law can be represented by the equation:  Current (amps) = Voltage (volts) / Resistance (ohms)    
You can use this equation to calculate the amount of current flowing through a material when voltage and resistance are known. 
You may have a better understanding of Ohm's law if you compare current flowing through a wire from a battery to water flowing through a garden hose from a tap. Opening the tap wider allows more water to flow through the hose.    
This is like increasing the voltage of the battery, which allows more current to flow through the wire. Stepping on the hose allows less water to flow through it. This is like increasing resistance in the wire, which allows less current to flow through it.

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