QuizWhiz 2025

Which of the following devices is unidirectional in nature?

• SCR

• TRIAC

• DIAC

• MOSFET

A buck converter is used for:

• Increasing voltage

• Decreasing current

• Increasing frequency

• Decreasing voltage

Which of the following is a controlled device?

• Diode

• TRIAC

• Resistor

• Inductor

Which switching device is best suited for high-frequency applications?

• BJT

• IGBT

• MOSFET

• SCR

In a single-phase full-bridge rectifier, the maximum output voltage is:

• Equal to input

• Double of input

• 2 × Vm

• Vm

What does the term 'commutation' in power electronics refer to?

• Signal multiplication

• Voltage regulation

• Turning off the device

• Energy conversion

Which of the following is NOT a renewable energy source?

• Biomass

• Geothermal

• Natural Gas

• Solar

Maximum efficiency of a solar panel is achieved at:

• Midnight

• Sunset

• Noon

• Cloudy Day

What is the function of an inverter in solar systems?

• To store energy

• To increase voltage

• To convert DC to AC

• To collect sunlight

Wind turbines convert:

• Mechanical to chemical

• Kinetic to electrical

• Heat to light

• Solar to thermal