Exercise: Materials And Components

Questions for: Materials And Components

An atom of a rare gas is placed is an electric field E. Then
A:
the nucleus will be shifted in the direction of E by an amount which is proportional to E.
B:
the nucleus will not be shifted.
C:
the nucleus will be shifted in the direction of E by an amount which is independent of E.
D:
the nucleus will be shifted in a direction opposite to that of E.
Answer: A

For equilibrium nucleus is shifted in the direction of E by an amount which is proportional to E.

📖
📝
💬
👁️

Assertion (A): A capacitor with imperfect dielectric can be represented by a capacitance in parallel with resistance.

Reason (R): For imperfect dielectrics, dielectric constant has real and imaginary parts.

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
Answer: A

Imaginary part of dielectric constant is responsible for dielectric losses.

📖
📝
💬
👁️
By inserting a plate of dielectric between the plates of a parallel plate capacitor, the energy stored in the capacitor is increased five times. The dielectric constant of material is
A:
B:
C:
5
D:
25
Answer: C

Capacitance is directly proportional to dielectric constant.

📖
📝
💬
👁️
If the radius of electron cloud around the nucleus of a rare gas atom is R, the electronic polarizability of the atom is porportional to
A:
R
B:
R2
C:
R3
D:
Answer: C

Since (∈r - 1) = 4p NR3, electronic polarizability ∝ R3.

📖
📝
💬
👁️
Silicon and germanium have diamond structure. The number of atoms in a volume equal to a3 where a is the edge of elementary cube are
A:
32
B:
16
C:
8
D:
4
Answer: C
No answer description is available. Let's discuss.
📖
📝
💬
👁️
Ad Slot (Above Pagination)
Quiz