J.J. Thomson originally called cathode rays as;

1. indivisible particle
2. corpuscle
3. proton
4. fundamental particle
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Answer: B
Explanation:
• corpuscle means minute particle
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Who named cathode rays as electron?

1. G. Johnstone Stoney
2. J.J Thomson
3. William Crooks
4. Goldstein
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Answer: A
Explanation:
• N/A
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Electrons can be obtained;

1. from Heated filament
2. by the action of x-rays or UV light on metals
3. as β-partible by radioactive substances
4. all of these
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Answer: D
Explanation:
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The charge to mass ratio (e/m) for electron;

1. depends upon the nature of cathode used in discharge tube
2. depends upon the nature of residual gas in discharge tube
3. both of these
4. remains constant
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Answer: D
Explanation:
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Who measured e/m value for electron?

1. R.A Milikan
2. J.J Thomson
3. William Crooks
4. Goldstein
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Answer: B
Explanation:
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The charge on an electron was determined by;

1. R.A Milikan
2. J.J Thomson
3. William Crooks
4. Goldstein
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Answer: A
Explanation:
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How many times an atom of hydrogen is heavier than an electron?

1. 1836
2. 1840
3. 1/1836
4. 1742
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Answer: A
Explanation:
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The mass of an electron as compared to the mass of one hydrogen atom is;

1. 1836
2. 1840
3. 1/1836
4. 1742
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Answer: C
Explanation:
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A particle having one unit negative charge and mass of 1/ 1836th of hydrogen atom is;

1. electron
2. proton
3. neutron
4. pions
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Answer: A
Explanation:
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Proton was discovered by;

1. Rutherford
2. Goldstein
3. J.J Thomson
4. Chadwick
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Answer: B
Explanation:
• N/A
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