From the discharge tube experiment, it was concluded that :

mass of proton is in fraction

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matter contains electrons

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nucleus contains positive charge

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positive rays are heavier than protons

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Solution

The correct option is B matter contains electrons
The Discharge tube experiment explains the particles of matter coming with a glow are cathode rays. Cathode rays have negatively charged electrons. So, option (B) is right.

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Q. When a high voltage of about 10000 volts is applied to a discharge tube having a perforated cathode and containing air at very low pressure of about 0.001 mm of mercury, a faint red glow is observed behind the cathode.
What were the conclusions of this experiment ?
i. Anode rays are positively charged.
ii. Since these rays are formed at the anode, they are known as anode rays.
iii. The experiment led to the discovery of electrons.
iv. The experiment led to the discovery of protons.

Q. In hydrogen discharge tube, it is observed that through a given cross-section

3.31 \times 10^{15}

electrons are moving from right to left and

3.12 \times 10^{15}

protons are moving from left to right. The current in the discharge tube and its direction will be

State whether the following statements are true or false:
(a) Thomson proposed that the nucleus of an atom contains protons and neutrons.
(b) The cathode rays obtained from all the gases consist of negetively charged particles called electrons.
(c) The anode rays obtained from all the gases consist of positively charged particles called protons.

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From the discharge tube experiment, it was concluded that :

The correct option is B matter contains electronsThe Discharge tube experiment explains the particles of matter coming with a glow are cathode rays. Cathode rays have negatively charged electrons. So, option (B) is right.

The correct option is B matter contains electrons
The Discharge tube experiment explains the particles of matter coming with a glow are cathode rays. Cathode rays have negatively charged electrons. So, option (B) is right.