Materials and Components - ECE Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

A magnet does not attract

nickel

iron

copper

iron and copper

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Bitter powder patterns prove the existence of domains.

True

False

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Assertion (A): An amorphous material is obtained when mobility of atoms is inhibited during solidification.

Reason (R): Crystalline state is a natural state for most solids.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true but R is false

A is false but R is true

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

An air cored inductance is a

linear circuit element because its reactance varies linearly with voltage at a fixed frequency

linear circuit element because its current varies linearly with voltage at a fixed frequency

nonlinear circuit element due to saturation of core

nonlinear circuit element because v =

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

The number of turns in a coil is doubled. If initial time constant is T, the new time constant is

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

When a trivalent impurity is added, the semiconductor becomes

p type

n type

intrinsic

neutral

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Iron has a body centred cubic structure.

True

False

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

The units of polarization of dielectric are

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

When a potential is applied across an intrinsic semiconductor, holes flow

towards positive terminal

away from positive terminal

in the external circuit only

none of the above