What is the Charge on the metal plate?

AI Thread Summary
When a charge of +Q is brought near a grounded metal plate with a closed switch, the plate acquires a negative charge due to induction. Once the switch is opened and the charge +Q is removed, the plate retains this induced negative charge. The assumption is that the plate behaves as if it is infinitely large, which simplifies the analysis using the Method of Images. This method helps to understand the charge distribution on the plate in relation to the nearby charge. Ultimately, the charge on the plate after the process is negative, equal in magnitude to the initial positive charge brought close to it.
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A metal plate is connected by a conductor to a ground through a switch. The switch is initially closed. A charge of +Q is brought close to the plate without touching it, and then the switch is opened. After the switch is opened, the charge +Q is removed. What is the charge on the plate then?



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This is all new to me, I have no clue.
 
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