Exercise: Materials And Components

Questions for: Materials And Components

The number of protons in germanium atom is
A:
4
B:
16
C:
28
D:
32
Answer: D
No answer description is available. Let's discuss.
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Hysteresis curve is associated with motion of domain walls.
A:
True
B:
False
C:
D:
Answer: A
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In the wave mechanical theory, the maximum of the charge distribution in the ground state occurs for a distance from the nucleus equal to
A:
first Bohr radius
B:
second Bohr radius
C:
third Bohr radius
D:
either first or second Bohr radius
Answer: A

The total charge associated with an electron moving about nucleus in the ground state of hydrogen atom is given by 4p2rr(r)dr.

This integrand has a maximum value at r = radius of first Bohr orbit.

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For dielectrics in alternating field, polarizability ae is a complex quantity. The imaginary part of ae is zero for
A:
ω = 0
B:
ω → ∞
C:
ω = 0 and ω → ∞
D:
ω = natural frequency ω0
Answer: C

Imaginary part of ae is zero for ω = 0 and ω = ∞.

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When Schrodinger equation is applied to the motion of electron in the field of protons, the physically acceptable solutions for the wave function exist for quantum number which are
A:
2
B:
3
C:
4
D:
5
Answer: B

There are three principal quantum numbers.

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