Modern Physics - Nuclei
Q. What is the main force that holds the nucleus together? (2020)
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A.
Electromagnetic force
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B.
Gravitational force
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C.
Weak nuclear force
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D.
Strong nuclear force
Solution
The strong nuclear force is the primary force that holds the nucleons (protons and neutrons) together in the nucleus.
Correct Answer: D — Strong nuclear force
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Q. What is the process called when a nucleus emits an alpha particle? (2019)
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A.
Beta decay
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B.
Gamma decay
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C.
Alpha decay
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D.
Fission
Solution
The emission of an alpha particle from a nucleus is known as alpha decay.
Correct Answer: C — Alpha decay
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Q. What type of decay involves the conversion of a proton into a neutron? (2019)
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A.
Alpha decay
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B.
Beta plus decay
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C.
Beta minus decay
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D.
Gamma decay
Solution
Beta plus decay involves the conversion of a proton into a neutron, emitting a positron.
Correct Answer: B — Beta plus decay
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Q. Which element is commonly used in nuclear reactors as fuel? (2022)
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A.
Uranium-235
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B.
Carbon-12
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C.
Hydrogen-1
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D.
Oxygen-16
Solution
Uranium-235 is commonly used as fuel in nuclear reactors due to its ability to sustain a chain reaction.
Correct Answer: A — Uranium-235
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