1. A cathode ray is a stream of A. protons
B. electrons
C. light
D. neutrons

2. The beam of light seen in a Crook's tube results from the interaction of phosphorescent material with A. the magnet
B. the high voltage from the power supply
C. the beam of electrons
D. None of these answers is correct.

3. In this experiment, reversing the magnet caused the cathode ray to A. deflect in the opposite direction
B. disappear
C. deflect in the same direction
D. change colors

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