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# Ohm's Law Simulation

1 Ω
2 Ω
3 Ω
∼ 0 Ω
12 V
0 A
0 A
0 A
0 A
Don't forget to turn on the switch!   Current flows at speed of light. It's slowed down here.
Instructions : Drag and drop the resistors into the drop areas (dashed grey boxes) and find out the relation between voltage (V), current (I) and resistance (R) of circuit.

### What is Resistance?

Resistance is the measure of obstruction offered to the flow of electric current through a material. The SI unit of electrical resistance is ohm (Ω). It depends upon the nature of material, length of the conductor and cross-section area of the wire.

### What is Ohms Law?

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
So, `I = V/R` where `V` is voltage, `I` is current and `R` is resistance of circuit. Or, rearranging, `V = I × R`.

### What is a Series Circuit?

When the components are connected end to end in a sequence, we call it a series circuit. The current flows along a single path so the current through each component remains the same. There is a different voltage drop across each component depending upon its resistance (as per Ohm's law, `Vn = Icircuit × Rn`). The sum of voltages across each component is equal to the total voltage provided by the power source (`Vcircuit = V1+V2+...+Vn`).

### What is a Parallel Circuit?

When each component is individually connected to the power source such that the current can take multiple paths, we call it a parallel circuit. Each component gets the same voltage and draws a different current depending upon its resistance (as per Ohm's law, `In = Vcircuit/Rn`). The sum of currents through each component is equal to the total current flowing through the circuit (`Icircuit = I1+I2+...+In`).