Which of the following is an appropriate power supply rating for a typical 50-watt output mobile FM transceiver?

Almost all standard amateur mobile transceivers are designed to operate on a 13.8-volt direct current (DC) electrical system. This voltage mimics the typical output of a running vehicle's alternator, immediately eliminating the 24.0-volt options. To produce 50 watts of radio frequency (RF) output, the transceiver must draw significantly more than 50 watts of input electrical power, as transmitters generally operate at less than 50 percent efficiency. Therefore, a power supply must be able to deliver 10 to 12 amperes at 13.8 volts to comfortably handle the required current without suffering a voltage drop or risking equipment damage.