Electrification Test

What is the sign of the net charge on A and B?

• A is negative and B is positive

• A is negative and B is negative

• A is positive and B is negative

• A is positive and B is positive

Which diagram represents the electric field between two oppositely charged conducting spheres?

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The electroscope shown above is made completely of metal and consists of a knob, a stem, and leaves. A positively charged rod is brought near the knob of the electroscope and then removed. The motion of the leaves results from electrons moving from the

• knob to the leaves, only

• leaves to the knob, only

• knob to the leaves and then back to the knob

• leaves to the knob and then back to the leaves

Two like charges:

•  neutralize each other.
• repel each other. 
• must be neutrons. 
• attract each other.

The charge of an electron is:

• Positive. 
• Negative. 
• Electrons have no charge

An atom loses an electron.  What type of charge does it have now?

• Positive
• Negative

An atom gains an electron.  What type of charge does it have now?

• Positive
• Negative
• No charge

When a balloon is rubbed on clothes it acquires a charge by ___________.

• Induction
• Reduction
• Friction 
• Concuction

When a glass rod is rubbed with silk and the glass rod becomes positively charged, what happens to the electrons?

• They are removed from the rod.
• They are added to the rod.

What do you call the process of charging a conductor by bringing it near another charged object?

• Induction
• Polarization
• Neutralization
• Conduction