The diagram shows a bridge rectifier circuit. A sinusoidal input voltage is fed into four...

The diagram shows a bridge rectifier circuit. A sinusoidal input voltage is fed into four identical diodes, each represented by the standard diode circuit symbol. The symbol indicates the direction of conventional current flow through the diode. The plots show input and output voltages versus time. Note that the output volt' age is strictly in one direction. Explain (a) how this circuit produces the unidirectional output voltage it does, and (b) what features in the output plot indicate that the band gap of the diodes is about hah" an electronvolt. (It might seem that about one volt is correct, but consider how many diodes are on and in series at any given instant. In fact, although not the usual habit, it might be more accurate to plot the output voltage shifted upward relative to the input.)