The Pulse Selector Switch affects:

• A. The size of the antenna.
• B. The repetition rate of the pulses.
• C. The larger/longer the pulse, the further I (the radar) can see.
• D. The duty cycle of the transmitter.

Answer: (C)

The Pulse Selector Switch controls how long each transmitted pulse lasts. A longer pulse delivers more energy per pulse. That extra energy means the radar can pick up weaker echoes from farther away, so the detectable range increases when the pulse is longer. It doesn’t change the antenna size or directly set how often pulses are sent (the repetition rate). It does affect the duty cycle, since a longer pulse takes up more of the transmission cycle, but the primary effect highlighted here is the greater range from more energy per pulse.