Is poor contact considered a short circuit or an open circuit?

[SanAlan]

Poor contact is an open circuit. Poor contact essentially means that the conductor cannot transmit current, which is equivalent to an open circuit in the circuit. A short circuit, on the other hand, occurs when the positive and negative terminals of the power supply are directly connected by a wire or a very small resistor, causing the circuit to burn out. Poor contact does not exhibit the same intense symptoms as a short circuit. The manifestations of short circuits and open circuits are as follows: 1. Manifestations of an open circuit: An open circuit is a fault in which a wire in the circuit breaks or has poor contact, resulting in the electrical appliance not receiving power. The specific manifestation is that the electrical appliance does not receive power and cannot function properly. Unlike a short circuit, an open circuit does not exhibit intense symptoms. In practical applications, observing the behavior of the circuit when the appliance loses power can help distinguish between open circuit and short circuit faults. 2. Manifestations of a short circuit: Short circuits are mostly caused by lightning strikes or excessive electrical load. During a short circuit, there is usually a sound of current breaking the wire. More severe short circuits can damage the power supply and cause a fire. Therefore, it is essential to avoid such occurrences in practical applications.