What does Ohms law show us?

Question

What does Ohms law show us?

Answer 1

Ohm's law is V=IR, voltage =(current)(resistance), it can be arranged however you like i=v/r is common.

It allows you to find the voltage, current or resistance over an individual circuit component or a whole circuit.

Being that I am mechanical, I always like to think of Ohm's law compared to mechanical properties, ie, current = voltage/ resistance.  So, the larger the resistor the smaller the current.  I like to think of the resistor as a valve, and the current as the amount of water flow.

Answer 2

V = IR

Voltage = Current x Resistance

(in an electrical circuit)

Answer 3

Ohm's Law shows us the relationship between Voltage, Current, and resistance in a circuit.  In a simple circuit, it states that Resistance(R) is equal to Voltage or Energy (V or E) divided by Current (I).  R= V/I, V=RI. or I=V/R.  Using I = V/R, if you had a component with a resistance of 100 Ohms running off a 9 volt battery, the current would be 90 mA (using I = V/R, I = 9volts/100 ohms = 0.090 Amps = 90 mA).  Keep in mind that a simple circuit contains one component and one energy souce.  Ohm's Law is applied a little bit differently in a parallel circuit than a series circuit, but, like I said earlier, it basically shows us the relationship of Voltage, Resistance, and Current.  Also, it is important to note that Power is NOT the same as Energy in this application as the unit of measure for Power is Watts and Energy is Volts.  Also, V and E are the same exact thing.

Answer 4

voltage is proportional to current, and the proportionality constant is the resistance. E = IR.