Yes, an electrical appliance does consume a small amount of current/electricity even when it is switched on but not working. This consumption is often referred to as "standby power" or "phantom power."
When an electrical appliance is plugged in and switched on, it remains connected to the power source and continues to draw a small amount of electricity to power internal components such as LED indicators, clocks, remote control receivers, sensors, or any other circuitry that needs to be active for the appliance to respond to user commands or to be ready for operation.
The amount of standby power consumed varies depending on the appliance's design and features. While the standby power draw is usually relatively low, it can add up over time if multiple appliances in a household are left plugged in but not in use.
To reduce standby power consumption, you can unplug electrical appliances when they are not in use or use power strips with on/off switches to completely disconnect them from the power source when not needed. Some modern appliances also come with energy-saving features that reduce standby power consumption.