What Part of a Laser Printer Puts a Positive Charge

question 3

Multiple Choice

 What part of a laser printer puts a positive charge on the paper in order to pull the toner from the drum onto the paper?

• A) transfer roller
• B) transfer belt
• C) pickup roller
• D) charging block

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Definitions:

Dependent Variable

The variable in experimental research that is expected to change as a result of manipulations to the independent variable.

Control Variable

A factor that is kept constant to accurately test the impact of an independent variable on a dependent variable in an experiment.

Placebo

A harmless substance with no therapeutic effect, used in controlled experiments to test the efficacy of treatments.

Control Group

In experimental research, a group of subjects who do not receive the treatment being tested, used as a benchmark to measure the effect of the treatment.