Find the power absorbed by the 12k ohm resistor on the right

Find the power absorbed by the 12-k ohm resistor on the right side of the network in Fig. P2.127.

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal. An amplifier functions by taking power from a power supply and controlling the output to match the input signal shape but with a larger amplitude.