Which technology is described as being similar to chopper technology?

• A. Inverter technology
• B. Transformer technology
• C. SCR technology
• D. PWM technology

Answer: (A)

The main idea here is that both chopper and inverter technologies control power by switching. A DC chopper changes the average voltage delivered to a load by turning a switch on and off at a controlled duty cycle, effectively chopping the DC waveform. An inverter uses high-speed switching to convert DC to AC, often employing pulse-width modulation to shape the output waveform. Because both rely on rapid on/off switching to regulate power rather than using a simple, static transformer action, inverter technology is the best match for being described as similar to chopper technology.

Transformer technology relies on magnetic coupling and a fixed transformer core, which isn’t about fast-switching power delivery. SCR technology centers on thyristor rectification and controlled conduction rather than the deliberate DC chopping of power. PWM technology is a modulation method used within switch-mode devices like inverters and choppers, but it isn’t itself a standalone power-conversion technology the way inverter technology is, so it’s not the best fit on its own.