a cathode ray tube (crt) uses a stream of particles to create a spot on a screen. students are asked to design an experiment to show that the particles in the stream are charged and to determine the sign of the charge. which of the following procedures will best accomplish the objective of the experiment?
A. Bringing a neutral conducting rod near the stream to see if the stream Is deflected if so, observing the direction of the deflection B. Bringing a neutral conducting rod near the stream to see if the spot on the screen changes size if so, observing whether the size of the spot increases or decreases C. Bringing a wire with known current near the stream to see if the stream is deflected if so, observing the direction of the deflection D. Bringing a wire with known current near the stream to see if the spot on the screen changes size, if so observing the whether the size of the spot increases or decreases
