Total resistance refers to the overall resistance of a circuit, which is the measure of how much the circuit resists the flow of electricity. It is measured in ohms (Ω) and is calculated by adding up the individual resistances of all components in the circuit.
To calculate total resistance, you need to know the individual resistances of all the components in the circuit. Then, you can use Ohm's Law (R = V/I) to calculate the total resistance, where R is the total resistance, V is the voltage applied to the circuit, and I is the current flowing through the circuit.
Tolerance refers to the acceptable range of error in a component's stated resistance value. It is usually expressed as a percentage and indicates how much the actual resistance can vary from the stated value. This is important to consider when calculating total resistance, as using components with a high tolerance can significantly affect the accuracy of the calculation.
The tolerance of a wire can be determined by looking at its specifications or datasheet. It is usually indicated as a percentage or a range of values. Additionally, the color bands on a resistor can also indicate its tolerance, with gold representing a tolerance of 5%, silver representing 10%, and no color indicating a tolerance of 20%.
No, the total resistance of a circuit can never be lower than the individual resistances. In fact, it is always equal to or greater than the individual resistances, as the addition of resistances in a circuit will always increase the overall resistance. This is known as the principle of series circuit.