Equivalent resistance refers to the single resistance value that can replace a combination of multiple resistors in a circuit without changing the overall current or voltage in the circuit.
Equivalent resistance is calculated by adding the individual resistances in a series circuit or by using the reciprocal formula (1/Req = 1/R1 + 1/R2 + ... + 1/Rn) for resistors in parallel.
A circuit is considered "stuck" when there is no current flowing through it, usually due to a break in the circuit or a malfunctioning component.
By calculating the equivalent resistance of a circuit, one can identify which components may be causing the circuit to be stuck and focus on troubleshooting those specific components.
Yes, in a series circuit, the equivalent resistance will always be greater than the individual resistances. In a parallel circuit, the equivalent resistance can be less than, equal to, or greater than the individual resistances depending on the values of the resistors.