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At time t=O, some radioactive gas is inj...

At time t=O, some radioactive gas is injected into a sealed vessel. At time T. some more mass of the sam gas is injected into the same vessel. Which one of the following graphs best represetns the variation of the logarithm of the acitivity A of the gas with time t?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
B
`A - A_(01) e^(-lamda t)`
`l n A - l n A_(0) - lamda t`
`l n` A versus t is a linearly decreasing graph with slope depending to `lamda` As `lamda` does not change, slope is charge remains same.
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RESONANCE ENGLISH-DAILY PRACTICE PROBLEM-DPP No.31
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