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Most Important Selected Qs for JEE AdvancedPhysicsElectromagnetic Waves

There are two radio active substances A and B whose disintegration constants are _A and _B respectively. At t=0 the number of radioactive nuclei of A is N_ A 0 and that of B is N_ B 0 . It is known that _A _B and N_ A 0 N_ B 0 . The broken line shows the variation of (N_A ) with respect to time for substance A . The graph of variation of In (N_B ) with respect to time t will be

Options

  1. AP
  2. BQ
  3. CR
  4. DS

Correct answer

C. R

Step-by-step solution

B will decay at slower rate than A . Also N_B N_A hence, R graph will indicate variation of In N_B with t .

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