Explanation:

A 3-phase full-wave bridge rectifier consists of six diodes arranged in a bridge configuration. It is used to convert an AC input voltage into a pulsating DC output voltage. The frequency of the AC input voltage is denoted by ω.

The output voltage of the rectifier will contain both the fundamental frequency and its harmonics. The fundamental frequency is the same as the frequency of the AC input voltage.

To understand why the correct answer is option 'B' (6ω), let's analyze the operation of a 3-phase full-wave bridge rectifier.

Operation of 3-Phase Full-Wave Bridge Rectifier:
1. The 3-phase AC input voltage consists of three phases: phase A, phase B, and phase C.
2. Each phase is connected to the corresponding diodes in the rectifier.
3. During the positive half-cycle of phase A, diodes D1 and D2 conduct, while diodes D4 and D5 are reverse-biased and do not conduct. This allows current to flow through the load in the forward direction.
4. Similarly, during the positive half-cycles of phase B and phase C, diodes D3 and D6, and D7 and D8 conduct, respectively.
5. During the negative half-cycles of the input phases, the diodes conduct in the opposite direction to allow current to flow through the load.

Frequency of the Output Voltage:
1. The output voltage of the rectifier is the sum of the voltages across the load during each half-cycle of the input phases.
2. The output voltage waveform will have six pulses per input cycle because there are six diodes in the bridge configuration.
3. The frequency of the output voltage is determined by the number of pulses per input cycle.
4. Since there are six pulses per input cycle, the frequency of the output voltage is six times the frequency of the AC input voltage.
5. Therefore, the fundamental frequency of the output voltage is 6ω, where ω is the frequency of the 3-phase source supplying the rectifier.

Hence, the correct answer is option 'B' (6ω).