Does a torch need a resistor?

A torch (flashlight) typically does not require a resistor if it is designed for standard batteries, as the internal circuitry is engineered to handle the voltage and current directly. However, if you're modifying or building a torch with components that have different voltage requirements, such as using a high-power LED, a resistor may be necessary to limit current and prevent damage to the LED. Always refer to the specifications of the components being used for proper setup.