Materials and Components
The resistance of a photoconductor

Remains constant
Decreases with increase in light intensity
May increase or decrease with increase in light intensity
Increases with increase in light intensity

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Materials and Components
An atom of a rare gas is placed is an electric field E. Then

The nucleus will be shifted in a direction opposite to that of E.
The nucleus will be shifted in the direction of E by an amount which is independent of E.
The nucleus will be shifted in the direction of E by an amount which is proportional to E.
The nucleus will not be shifted.

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