Cathode rays have

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(D) Cathode rays possess both mass and charge. Cathode rays are streams of electrons,which are negatively charged particles. Since electrons have a ma

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Mass and charge both

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(D) Cathode rays possess both mass and charge. Cathode rays are streams of electrons,which are negatively charged particles. Since electrons have a mass of $9.109 	imes 10^{-31} \ kg$ and a charge of $-1.602 	imes 10^{-19} \ C$,cathode rays also exhibit these properties. The ratio of $e / m$ for a cathode ray is constant at $1.758820 	imes 10^{11} \ C / kg$,which confirms they consist of particles with mass and charge.

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