Apositive charge is placed within the sphere without touching it. you grounded the sphere by touching it with your finger. then you first removed your finger and then pulled the charge from inside the sphere, again without touching it. what is the remaining charge on the sphere?

Negative

Explanation:

If a negatively charged object is used to charge a neutral object by induction, then the neutral object will acquire a positive charge. And if a positively charged object is used to charge a neutral object by induction, then the neutral object will acquire a negative charge:

We have a neutral sphere

1) Electrons are attracted to the positive charge

2) Electrons enter the sphere from ground, attrated to the + charge in the sphere

3) The sphere has an excess of e- having entered from the ground

4) Electrons redistribute uniformly

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

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