IndiaBIX

Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 3
21.
The dielectric constant of ferroelectric materials can be expressed by the equation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
A liquid has N permanent dipoles μp per unit volume and has been subjected to dc field for a long time such that orientation polarization is P0. At t = 0, the field is suddenly removed, then polarization
will remain constant at P0
will become zero at t = 0
will delay to zero with a time constant
either b or c
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.

Assertion (A): Orbital magnetic moment of an electron in an atom is of the order of 1 Bohr magneton.

Reason (R): 1 Bohr magneton = 9.27 x 10-24 A/m2.

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
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
As per Bohr's postulate, only those circular orbits are stable for which the angular momentum is equal to an integer times .
True
False
Answer: Option
Explanation:

It is a quantum condition postulated by Bohr.

25.
Inductors used at V.H.F. are made using
air core
cast iron cored
sheet steel cored
thin film technique
Answer: Option
Explanation:

Thin film technique ensure low hysteresis and eddy current losses.

Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers