As regards ?0 and ?r (absolute and relative permittivity) both ?0 and ?r can be

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Electronics and Communication Engineering ‣ Materials and Components Comments

Question
As regards ?₀ and ?_r (absolute and relative permittivity)
Options
A. both ?₀ and ?_r can be interpreted in terms of atomic properties of medium
B. only ?_r can be interpreted in terms of atomic properties of medium
C. only ?₀ can be interpreted in terms of atomic properties
D. ?_r has no physical significance

Correct Answer

only ?_r can be interpreted in terms of atomic properties of medium

Materials and Components problems

Search Results

2. Assertion (A): For most metals, Fermi energy E_F is less than 10 eV.
Reason (R): Fermi level of a metal is given by E_F = 3.64 x 10^-19 (n)^2/3 where n is number of free electrons/m³ of metal.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

5. 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.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

6. An electron is moving in a circular orbit of radius R at angular velocity ?₀ in a field free space. If a magnetic field B is created, the velocity of electron ? will be given by the equation
Options
A.
B.
C.
D.

8. At a very low temperature, a semiconductor
Options
A. becomes a conductor
B. becomes an insulator
C. may become a conductor or an insulator
D. will remain a semiconductor becomes a conductor or an insulator

9. Assertion (A): Helium, Argon and Neon are gaseous at room temperature.
Reason (R): The atoms in Helium, Argon and Neon are chemically extremely inactive.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

Comments

More in Electronics and Communication Engineering: