71. If a U238 nucleus splits into two identical parts, the two nuclei so produced will be
72. Which of the following particles are constituents of the nucleus?
73. Among the following radiations, which has the highest energy?
74. Which type of reaction produces the most harmful radiation?
75. Which of the following statements are true?
1. All radioactive elements decay exponentially with time.
2. Half-life time of radioactive elements is the time required for one-half of the radioactive atoms to disintegrate.
3. Age of the earth can be determined by radioactive dating.
4. Half-life time of a radioactive element is fifty percent of its average life period.
Select the correct answer:
1. All radioactive elements decay exponentially with time.
2. Half-life time of radioactive elements is the time required for one-half of the radioactive atoms to disintegrate.
3. Age of the earth can be determined by radioactive dating.
4. Half-life time of a radioactive element is fifty percent of its average life period.
Select the correct answer:
76. The important nuclear fuel available in India in abundance is
77. Positive rays are very identical to
78. The minimum energy required for the emission of photoelectron from a metal is called
79. Waves that are required for long distance wireless communication are
80. The half-life of a radioactive substance is 10 days; it means there will be
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