Q. Which of the following can liberate photo electrons when they fall on certain metals?

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Q. Which of these particles are highly penetrating?

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Q. Alpha emission is characteristic of heavier radioactive elements such as thorium, uranium, etc.

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Q. Which of the following is not a mode by which beta particles lose energy on interaction with matter?

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Q. The stability of the nucleus can be predicted by which of the following?

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Q. Which of the following is true about radiochemical methods?

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Q. Which of the following formulae gives the expression for half-life of a radioactive isotope when ‘λ’ is the decay constant?

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Q. Which of the following emissions have low ionizing power?

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Q. Which of the following effect occurs when a gamma ray and an electron make an elastic collision?

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Q. Which of the following effects transfers all the energy of the gamma ray to an electron in the inner orbit of the atom of the absorber?

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Q. The basic unit used to describe the energy of a radiation particle is curie.

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Q. Which of the following is not a type of radiation detectors?

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Q. ‘When nuclear radiations pass through, gas ionization is produced.’ This is the principle of which of the following detectors?

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Q. Which of the following acts as quenching gas in Geiger Muller counter?

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Q. Which of the following acts as ionising gas in Geiger Muller counter?

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Q. Which of the detectors is similar to Geiger Muller counter in construction but is filled with heavier gas?

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Q. Which of the following gases are used in the proportional counter as the ionising gas?

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Q. Which of the following is the main disadvantage of solid state semiconductor detector?

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Q. Scintillation detector is a large flat crystal of which of the following materials?

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Q. When X-ray enters the solid state detector it produces ion pair rather than electron-hole pair.

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