Engineering Question:

The attraction between the nucleus and valence electron of copper atom is:
A. zero
B. weak
C. strong
D. either zero or strong

Option B
(weak)
Explanation:
The valence electron, in copper atom, can be easily detached from nucleus.

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The hysteresis phenomenon in ferromagnetic materials exists at all temperatures. A. True B. False	There is no hysteresis phenomenon is any dielectric material. A. True B. False