The cathode ray tube uses which of the following to direct electron a) electric fields b) bar magnets c) magnetic fieldsd) gravitational field did the cathode ray tube allow j. j. thomson to do? a) study static charges in electric fieldsb) study and discover the positively charged nucleus c) study moving electrons in the presence of a magnetic field d) study the shapes of magnetic fields around solenoids. : )

The cathode ray tube is vacuum tube that contains a stream of electrons. These electrons are negatively charged particles. In order to direct these electrons to a specific pathway, a magnetic field is being used to exert forces over the negatively charged particles that are in motion.

Therefore, the answer is C. MAGNETIC FIELD

J.J. Thompson discovered the electron, which a constituent of the subatomic particles under the cathode ray tube experiment.

Therefore, the answer is C. STUDY OF MOVING ELECTRONS IN THE PRESENCE OF MAGNETIC FIELD.