To calculate the equivalent resistance in a simple circuit, you can use the formula R = R1 + R2 + R3 + ..., where R1, R2, R3, etc. are the individual resistances in the circuit. Simply add up all the resistances in the circuit to get the equivalent resistance.
The purpose of calculating equivalent resistance in a circuit is to simplify the circuit and make it easier to analyze. Instead of having multiple resistors in a circuit, we can calculate the equivalent resistance and treat the circuit as if it only has one resistor. This makes it easier to understand and solve problems in the circuit.
No, the equivalent resistance in a circuit can never be lower than the lowest individual resistance. In fact, it will always be equal to or greater than the lowest resistance. This is because resistors in parallel have an overall lower resistance compared to resistors in series, so adding resistors in parallel will always decrease the equivalent resistance.
When there are both series and parallel resistors in a circuit, you can use the equivalent resistance formula for series and parallel circuits. For series resistors, use the formula R = R1 + R2 + R3 + ..., and for parallel resistors, use the formula 1/R = 1/R1 + 1/R2 + 1/R3 + ... . Once you have calculated the equivalent resistance for each type of circuit, add them together to get the overall equivalent resistance for the entire circuit.
Technically, there is no limit to the number of resistors that can be added in series or parallel in a circuit. However, as you add more resistors, the equivalent resistance will decrease for parallel resistors and increase for series resistors, making the circuit more complex to analyze. It is generally recommended to limit the number of resistors in a circuit to make it easier to understand and solve problems.
