When cathode rays are deflected onto the electrode of an electrometer; the instrument becomes?

A. Bipolar
B. Negatively charged
C. Positively charged
D. Neutral

Correct Answer:

Option B – Negatively charged

Explanation

When these cathode rays are deflected onto an electrode of an electrometer, the instrument measured a negative charge. The rays tested also were deflected by application of an electric field.