What happens when a resistor is short circuited?

When a resistor is short-circuited, it means that there is a direct path of low resistance across its terminals, bypassing the intended circuit elements. This results in a significant increase in current flow through the resistor, limited only by the internal resistance of the power source and the wiring resistance. This can lead to overheating and potentially damaging other components in the circuit.

To determine if a resistor is short-circuited, you can measure the resistance across its terminals using a multimeter. If the multimeter shows a very low resistance value (close to zero ohms), significantly lower than the resistor’s rated resistance, it indicates that the resistor is short-circuited.

If a resistor fails in a circuit, it can affect the circuit’s functionality depending on its role. For example, if the resistor is part of a voltage divider network, its failure could cause incorrect voltage levels at critical points in the circuit, leading to improper operation or failure of connected components. In some cases, a failed resistor may overheat, change resistance value significantly, or become an open circuit, interrupting normal circuit operation.

When a resistor breaks in a circuit, it typically becomes an open circuit, meaning there is no continuous path for current flow through it. This can lead to a loss of functionality in the part of the circuit where the resistor is essential, causing a lack of proper voltage levels or current paths needed for other components to operate correctly.

A short circuit occurs when there is an unintended connection of low resistance between two points in a circuit that are supposed to have different potentials. This can result in a large current flow, potentially causing overheating, damage to components, or even electrical hazards such as fires or electrical shocks. Short circuits are typically unintended and can occur due to wiring faults, component failures, or physical damage to insulation or components in the circuit.

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