Conduction, Induction, and Grounding

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 ____.

• positive, negative

• positive, positive

• negative, positive

• negative, negative

• neutral, positive

Tags

NGSS.MS-PS2-5

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.

• neutral sphere, charged rod, negative

• neutral sphere, charged rod, positive

• charged rod, neutral sphere, negative

• charged rod, neutral sphere, positive

• ... nonsense! None of these describe what occurs.

Tags

NGSS.MS-PS2-5

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.

• charged rod, neutral sphere, negative

• charged rod, neutral sphere, positive

• neutral sphere, charged rod, negative

• neutral sphere, charged rod, positive

• ... nonsense! None of these describe what occurs.

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? Check all that apply.

• The metal sphere gains some protons.

• Electrons are transferred from the sphere to the rod.

• The metal sphere loses electrons.

• The overall charge of the system is conserved.

• Protons are transferred from the rod to the sphere.

A positively charged pop can is touched by a person standing on the ground. The pop can subsequently becomes neutral. The pop can becomes neutral during this process because ______.

• electrons pass from the pop can to the person (ground)

• electrons pass from the person (ground) to the pop can

• protons pass from the pop can to the person (ground)

• protons pass from the person (ground) to the pop can

A physics student, standing on the ground, touches an uncharged plastic baseball bat to a negatively charged electroscope. This will cause ___.

• the electroscope to be grounded as electrons flow into the electroscope.

• the electroscope to be grounded as protons flow out of the electroscope.

• the electroscope to be grounded as protons flow into the electroscope.

• the baseball bat to acquire an excess of protons.

• absolutely nothing (or very little) to happen since the plastic bat does not conduct.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS2-5

NGSS.HS-PS3-5

An object that becomes grounded gains neutrons during the grounding process.

• True

• False

Two neutral conducting pop 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

• impossible to tell

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

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 occur as the glass rod approaches Can X? List all that apply.

• Electrons jump from can X to the glass rod.

• Electrons jump from can Y to the glass rod.

• Protons jump from the glass rod to can X.

• Protons jump from can X to the glass rod.

• ... nonsense! None of these occur.

Tags

NGSS.MS-PS2-3

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

Tags

NGSS.MS-PS2-3