A small, metal sphere hangs by an insulating thread within the larger, hollow co

Question

A small, metal sphere hangs by an insulating thread within the larger, hollow conducting sphere of (FIGURE Q27.10). A conducting wire extends from the small sphere through, but not touching, a small hole in the hollow sphere. A charged rod is used to transfer positive charge to the protruding wire. After the charged rod has touched the wire and been removed, are the following surfaces positive, negative, or not charged? Explain.

a. The small sphere.

b. The inner surface of the hollow sphere.

c. The outer surface of the hollow sphere.

Explanation / Answer

( a) The small sphere aquires postive charge as the charged rod trasfer positive charge through wire that passing through the small sphere.

(b) Due to the postive charge on the surface of the small sphere, there should be induce a negative charge at the inner surface of the hollow sphere.

Thus, the charge on inner surface is negative.

(c)

As the inner surface is negative, the out surface of the hollow sphere aquires a charge with opposite sign, that is positve charge.

Thu, the answers:

a. The small sphere - postively charged

b. The inner surface of the hollow sphere - Negatively charged

c. The outer surface of the hollow sphere -  postively charged

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.