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Q.

A free neutron has half life of 14 minutes. Its decay constant is

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a

8.25 × 10–4S–1

b

8.25 × 10–2S–1

c

8.25 × 10–3S–1

d

8.25 × 101S–1

answer is C.

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Detailed Solution

T = 14min = 14×60 = 840sec
λ=0.693T=0.693840=8.25×104s1

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A free neutron has half life of 14 minutes. Its decay constant is