Low-speed USB is a USB mode that operates at a relatively slow data transfer rate. It was introduced with the USB 1.1 specification and is used for devices that do not require high-speed data transfer capabilities. The transfer rate for low-speed USB is 1.5 Mb/s (megabits per second).

Explanation:

USB (Universal Serial Bus) is a standard interface used for connecting various devices to a computer. It provides a simple and convenient way to connect peripherals such as keyboards, mice, printers, and storage devices to a computer.

USB supports multiple transfer modes, including low-speed, full-speed, and high-speed. Each mode has different data transfer rates, with low-speed being the slowest.

The low-speed mode is primarily used for devices that do not require high-speed data transfer, such as keyboards and mice. These devices typically send small amounts of data and do not need the faster transfer rates provided by higher-speed modes.

The low-speed USB mode has a transfer rate of 1.5 Mb/s. This means that it can transfer up to 1.5 megabits of data per second. It is important to note that this is the maximum theoretical transfer rate and actual transfer rates may be lower due to various factors such as device limitations and system overhead.

Low-speed USB uses a polling mechanism where the host (typically the computer) periodically checks if any devices have data to send. This polling mechanism allows for efficient utilization of the available bandwidth and helps prevent data collisions between devices.

In summary, the transfer rate for low-speed USB is 1.5 Mb/s. This mode is used for devices that do not require high-speed data transfer and provides a simple and efficient way to connect peripherals to a computer.