Home » Regulated Power supplies » 6 In the block marked regulator below, a diode may be placed reverse across the regulator. Its job is to: a. Block negative voltages from appearing at the output b. Blow a fuse if high voltages occur at the output c. Blow a fuse if negative currents occur at the output d. Bypass the regulator if higher voltages occur on the output of the regulator compared with the input |