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A small glass bead has been charged to + 50.0 nC . A small metal ball...

A small glass bead has been charged to + 50.0 nC . A small metal ball bearing 1.50 cm above the bead feels a 1.90×10−2 N downward electric force.

What is the charge on the ball bearing?

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Answer #1

Charge on glass bead,

Distance between glass bead and metal ball,

The metal ball is placed above the glass bead.

The metal ball experience a downward attractive force.

Like charges repel and unlike charges attract.

Since the charge on the glass bead is positive, the charge on the metal ball should be negative.

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Electric force,

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