ENGINEERING MATERIALS IN EE QUIZ

The temperature beyond which substances lose their ferroelectric properties, is known as

curie temperature.

conversion temperature.

critical temperature.

inversion temperature.

TRUE ANSWER : ?
YOUR ANSWER : ?

The electron configuration of copper is

1s2 , 2s2 2p6, 3s2 3p6 3d9, 4s2.

none of above.

1s2 , 2s2 2p6, 3s2 3p6 3d8, 4s1 4p

1s2 , 2s2 2p6, 3s2 3p6 3d10, 4s1.

TRUE ANSWER : ?
YOUR ANSWER : ?

Almost the entire mass of an atom is concentrated in the

nucleus.

electrons.

neutrons.

protons.

TRUE ANSWER : ?
YOUR ANSWER : ?

Dielectric constant for vacuum is

100.

0.

1.

infinity.

TRUE ANSWER : ?
YOUR ANSWER : ?

All ions of an element have the same

number of electrons.

atomic number.

both option A. and C.

number of protons.

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the dielectric constant of mica ?

200.

3 to 8.

1 to 2.

100.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which statement is not true of ferromagnetic materials.

They have large magnetic susceptibility.

They have fixed value of μr.

They lose their nonlinearly property above the Curie temperature.

Energy loss is proportional to the area of hysteresis loop.

TRUE ANSWER : ?
YOUR ANSWER : ?

When the atomic magnetic moments are randomly oriented in a solid its magnetic behavior is termed as

paramagnetic.

anti-ferromagnetic.

semi-magnetic.

poly crystalline.

TRUE ANSWER : ?
YOUR ANSWER : ?

Two different isotopes of an element have different

numbers of electrons.

atomic number.

numbers of protons.

numbers of neutrons.

TRUE ANSWER : ?
YOUR ANSWER : ?

According to the Bohr model, an electron gains or losses energy only by

jumping from one allowed orbit to another.

moving faster or slower in an allowed orbit.

being completely removed from an atom.

jumping from one atom to another atom.

TRUE ANSWER : ?
YOUR ANSWER : ?

↑