Q. The half-life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half-life period of a radioactive substance is one month, then?

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Q. Which of the following ores contains maximum percentage of uranium?

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Q. Percentage of U-238 in natural uranium is around __________

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Q. Uranium ore is currently mined & concentrated at __________

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Q. Graphite is used in nuclear reactor as __________

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Q. A fast breeder reactor employs __________

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Q. U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent.

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Q. The half-life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.

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Q. Which of the following is a non-fissile material?

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Q. Fast breeder reactors are most usable in India, because of our largest __________ deposits.

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Q. Which is the main ore of thorium?

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Q. Commercial power generation from fusion reactor is not yet possible, because __________

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Q. First experimental observation of nuclear fission was done by __________

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Q. Function of control rod in a nuclear reactor is to control __________

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Q. “Critical mass” is the minimum mass of nuclear fissile material required for the __________

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Q. Which of the following nuclear materials is fissile?

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Q. Unit of Radioactivity is?

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Q. The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is?

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Q. Critical energy should be __________ the neutron binding energy of the atom in order to initiate a nuclear fission.

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Q. Which is the main ore of uranium?

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