The radioactivity of a certain material drops to 1/16 of the initial value in 2 hours.

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The radioactivity of a certain material drops to 1/16 of the initial value in 2 hours. The half-life of this radio nuclide is

Options

(a) 10 min
(b) 20 min
(c) 30 min
(d) 40 min

Correct Answer:

30 min

Explanation:

In 4 × T₁/₂, N = (N₀ / 2) × (1 / 2) × (1 / 2) × (1 / 2)

= N₀ / 16 4 × T₁/₂ = 2 hrs.

⇒ T₁/₂ = 30 min

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Topics: Radioactivity (83)
Subject: Physics (2479)

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