To calculate the equivalent resistance when resistances are parallel, you can use the formula 1/Req = 1/R1 + 1/R2 + 1/R3 + ....+ 1/Rn, where Req is the equivalent resistance and R1, R2, R3, etc. are the individual resistances. Or, you can use the shortcut formula Req = R1 * R2 * R3 * ... * Rn / (R1 + R2 + R3 + ... + Rn).
When resistances are added in parallel, the equivalent resistance decreases. This means that the overall resistance of the circuit decreases, allowing more current to flow through the circuit.
No, the equivalent resistance can never be less than the smallest resistance in a parallel circuit. The equivalent resistance will always be lower than the smallest resistance, but it will never be lower than the smallest resistance.
As the equivalent resistance decreases in a parallel circuit, the current increases. This is because the decrease in resistance allows more current to flow through the circuit, according to Ohm's Law (I = V/R).
Sure, let's say we have two resistors in parallel, with values of 4 ohms and 6 ohms. Using the formula 1/Req = 1/R1 + 1/R2, we get 1/Req = 1/4 + 1/6. Simplifying this equation, we get 1/Req = 5/12. Inverting both sides, we get Req = 12/5, or 2.4 ohms. So, the equivalent resistance in this parallel circuit is 2.4 ohms.