Electrostatics

A neutral metal sphere is touched by a negatively charged metal rod. As a result, the sphere will be ____ and the metal rod will be ____. Select the two answers in their respective order.

• Negative, Negative

• Positive, Positive

• Negative, Positive

• Positive, Negative

A neutral metal sphere is touched by a negatively charged metal rod. During the process, electrons are transferred from the _____ to the _____ and the sphere acquires a _____ charge.

• charged rod, neutral sphere, positive

• neutral sphere, charged rod, positive

• neutral sphere, charged rod, negative

• charged rod, neutral sphere, negative

• Sir, this is too hard.

A neutral metal sphere is touched by a positively charged metal rod. During the process, protons are transferred from the _____ to the _____ and the sphere acquires a _____ charge.

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A metal sphere is electrically neutral. It is touched by a positively charged metal rod. As a result, the metal sphere becomes charged positively. Which of the following occur during the process? List all that apply.

• The metal sphere gains some protons.

• Electrons are transferred from the sphere to the rod.

• The overall charge of the system is conserved.

• The metal sphere loses electrons.

• Protons are transferred from the rod to the sphere.

Two neutral metal cans are touching each other. A positively charged balloon is brought near one of the cans as shown below. The cans are separated while the balloon is nearby, as shown. After the balloon is removed the cans are brought back together. When touching again, can X is ____.

• positively charged

• negatively charged

• neutral

• Not enough information

Two neutral conducting pop cans are touching each other. A positively charged glass rod is brought near Can X as shown below. Which of the following occurs as the glass rod approaches Can X? List all that apply.

• Electrons jump from the glass rod to can X.

• Electrons jump from the glass rod to can Y.

• Electrons jump from can X to the glass rod.

• All of the above

• None of the above

Two neutral conducting pop cans are touching each other. A negatively charged balloon is brought near Can X as shown below. As the balloon approaches Can X, there is a movement of electrons between the balloon and can X (in one direction or the other).

• True

• False

A positively charged balloon is brought near a neutral conducting sphere as shown below. While the balloon is near, the sphere is touched (grounded).

At this point, there is a movement of electrons. Electrons move ____ .

• into the sphere from the ground (hand)

• out of the sphere into the ground (hand)

• towards the sphere from the ground (hand)

• away of the sphere into the ground (hand)

• into the sphere from the balloon

A negatively charged balloon is brought near a neutral conducting sphere as shown below. As it approaches, charge within the sphere will distribute itself in a very specific manner. Which one of the diagrams below properly depicts the distribution of charge in the sphere?

• a

• b

• c

• d

Which of the following require CONTACT between two objects

• Induction

• Conduction

• Friction