You have covered a grounded metal surface with a layer of photoconductor. Working in the dark, you sprinkle negative charge onto this surface. If you now expose only the left half of the photoconductor to light, you will find that
A) the left half becomes neutral while the right half remains negatively charged.
B) nothing happens because there is no changing magnetic field.
C) negative charge flows from the right side of the photoconductor to the left and both sides become neutral.
D) the right half becomes neutral while the left half remains negatively charged.

Question

Quizplus · Accepted Answer

When the left half of the photoconductor is exposed to light, it becomes conductive, allowing the negative charge on that side to flow to the grounded metal surface beneath, neutralizing the left half. The right half, not exposed to light, remains insulating and thus retains its negative charge.

You Have Covered a Grounded Metal Surface with a Layer