Weft thread and warp thread are taken into a device which converts them into a fabric. Identify this device from the given options.
A device "X" converts the electrical energy into mechanical energy and energy "Y". Identify 'X' and 'Y' from the below-mentioned options.
A device "X" converts the electrical energy into mechanical energy and the other device "Y" converts mechanical energy into electrical energy. Identify the devices X and Y.