General in Engineering Materials Science : Practice MCQ Questions & Answers with Explanations

2 practice sets · Page 1 of 1

Engineering Materials ScienceEasyGeneral

1.

The maximum electric field strength above which an insulating material begins to break down and conduct is called _ strength.

A

Capacitive

B

Dielectric

C

Magnetic

D

Inductive

View Answer

Correct Answer: B — Dielectric

Explanation:

Explanation: Dielectric Strength Definition: Dielectric strength is the maximum electric field strength that an insulating material can withstand without breaking down or losing its insulating properties. It is a critical parameter in electrical engineering, particularly for materials used in capacitors, insulators, and other electrical components. When the electric field exceeds this limit, the material undergoes electrical breakdown, resulting in conduction and loss of insulating capabilities.

Engineering Materials ScienceEasyGeneral

2.

According to the orientation or connection of semiconductor devices to form inverter circuits, which of the inverters is not a part of it?

A

Bus Inverters

B

Parallel Inverters

C

Bridge Inverters

D

Series Inverters

View Answer

Correct Answer: A — Bus Inverters

Explanation:

Explanation: Inverter Circuits: Definition: An inverter is an electronic circuit that converts direct current (DC) into alternating current (AC). Inverter circuits are fundamental components in power electronics and are used in various applications such as power conversion, renewable energy systems, and motor drives. Inverters are designed using semiconductor devices like diodes, transistors, MOSFETs, or IGBTs, which are connected in specific configurations to achieve the desired functionality.