How to calculate any resistance
Answers
Explanation:
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm's Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.
Answer:
(1)Identify a series circuit. A series circuit is a single loop, with no branching paths. All the resistors or other components are arranged in a line.
(2)
Add all resistances together. In a series circuit, the total resistance is equal to the sum of all resistances.[1] The same current passes through each resistor, so each resistor does its job as you would expect.
For example, a series circuit has a 2 Ω (ohm) resistor, a 5 Ω resistor, and a 7 Ω resistor. The total resistance of the circuit is 2 + 5 + 7 = 14 Ω.
(3)
Start with current and voltage instead. If you don't know the individual resistance values, you can rely on Ohm's Law instead: V = IR, or voltage = current x resistance. The first step is to find the circuit's current and total voltage:
The current of a series circuit is the same at all points on the circuit.[2] If you know the current at any point, you can use that value in this equation.
The total voltage is equal to the voltage of the supply (the battery). It is not equal to the voltage across one component.