Atomic Nucleus|. Practice MCQs Physics for Mdcat By Engr. Kamran Soomro | mosaicbro.com

Atomic Nucleus|. Practice MCQs Physics for Mdcat By Engr. Kamran Soomro

7 of 114 questions (Page 2 of 17)

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8 Beta particles are:
Correct Answer: C
Explanation: Beta particles are high-energy electrons or positrons.
9 A deuteron is:
Correct Answer: A
Explanation: A deuteron is the nucleus of deuterium, consisting of one proton and one neutron.
10 A particle having the mass of an electron and the charge of a proton is called:
Correct Answer: D
Explanation: A positron is the antimatter counterpart of an electron, with the same mass but positive charge.
11 Fusion chain reaction are possible in:
Correct Answer: C
Explanation: Fusion reactions power the sun and stars, where light nuclei combine to form heavier ones.
12 Atomic theory was announced by Dalton in:
Correct Answer: C
Explanation: John Dalton introduced atomic theory in 1808.
13 The electron was discovered by J. J. Thomson by passing an electric discharge through:
Correct Answer: C
Explanation: Thomson used cathode ray tubes filled with low-pressure gas to discover electrons.
14 Charge on an electron was determined by:
Correct Answer: C
Explanation: Robert Millikan's oil-drop experiment measured the charge of an electron.
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