Power Electronics | MCQs

Explanation

Inverters and rectifiers are electronic circuits that can change the type of electric current.

An inverter converts DC to AC,

while

a rectifier converts AC to DC.

Explanation

For high current flow in electrical circuits, one needs thick conductors.

Thick conductors can handle larger currents with lower resistance, reducing heat and power loss.

Explanation

The voltage regulator is used in a vehicle to control the voltage produced at the output of the alternator.

It ensures the voltage remains within a specific range to protect the vehicle's electrical components.

Explanation

 A DIAC is a full-wave or bi-directional semiconductor switch that can be turned on in both forward and reverse polarities.

Explanation

A half-wave rectifier provides a pulsating DC output.

It is generally sufficient for charging batteries but not suitable for running AC motors or sensitive electronic devices.

Explanation

SCR (Silicon Controlled Rectifier) is a unidirectional device.

It allows current to flow in only one direction, from anode to cathode.

It is controlled by a gate signal.

Explanation

The conduction in an SCR (Silicon Controlled Rectifier) is controlled by the gate.

Applying a gate signal triggers the SCR to conduct between the anode and cathode.