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Version 2.2

Objective: To describe - in terms of particle movement - the two-step process of charging by induction.

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Charging by Induction

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Step 1: Polarization

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Step 2: Charging

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How does the pie tin become charged? And what charge does it acquire? Tap on the hot spots below to select your answers.

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A neutral aluminum pie tin is charged by induction.   Step 1: The neutral pie tin is brought near a positively-charged acrylic board.   Step 2: While the pie tin is held near the board, it is touched by a finger.   The result is the pie tin becomes charged. 

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What particle movement explains why this occurs? Tap on diagram to toggle through the choices.EndFragment    

Induction

A neutral aluminum pie tin is charged by induction.   Step 1: The neutral pie tin is brought near a negatively-charged foam board.   Step 2: While the pie tin is held near the board, it is touched by a finger.   The result is the pie tin becomes charged. 

How does the sphere become charged? And what charge does it acquire? Tap on the hot spots below to select your answers.

A neutral metal sphere is charged by induction.   Step 1: A positively-charged balloon is brought near the neutral sphere.   Step 2: While the balloon is held near, the sphere is touched.   The result is the sphere becomes charged. 

A neutral metal sphere is charged by induction.   Step 1: A negatively-charged balloon is brought near the neutral sphere.   Step 2: While the balloon is held near, the sphere is touched.   The result is the sphere becomes charged. 

How does the pie tin A become charged? And what charge does it acquire? Tap on the hot spots below to select your answers.

A neutral aluminum pie tin is charged by induction.   Step 1: Neutral pie tin A is brought near a positively-charged acrylic board.   Step 2: While the pie tin is held near the board, it is touched by a second neutral aluminum pie tin B.   The result is that pie tin A becomes charged. 

A neutral aluminum pie tin is charged by induction.   Step 1: Neutral pie tin A is brought near a negatively-charged foam board.   Step 2: While the pie tin is held near the board, it is touched by a second neutral aluminum pie tin B.   The result is that pie tin A becomes charged. 

How does sphere A become charged? And what charge does it acquire? Tap on the hot spots below to select your answers.

A neutral metal sphere is charged by induction.   Step 1: A positively-charged balloon is brought near neutral sphere A.   Step 2: While the balloon is held near, sphere A is touched by neutral metal sphere B.   The result is that sphere A becomes charged. 

A neutral metal sphere is charged by induction.   Step 1: A negatively-charged balloon is brought near neutral sphere A.   Step 2: While the balloon is held near, sphere A is touched by neutral metal sphere B.   The result is that sphere A becomes charged.