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Question
From α, β and γ-rays, name the one which is not affected by electric or magnetic field?
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Solution
γ-rays are not affected by electric or magnetic field.
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What is thermionic emission?
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In following fig. shows a mixed source S of alpha and beta particles in a thick lead container. The particles pass through a magnetic field in a direction perpendicular to the plane of paper (inwards as shown by x). State and show in the diagram how the particles get affected.

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