JEE Main 2023 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 10 April 2023, Shift 1, Physics Q56

Question 56 of 90 in this shift, Physics question 26 of 30, Section B.

The decay constant for a radioactive nuclide is

1.5\times10^{-5}\,s^{-1}

. Atomic weight of the substance is 60 g mole

^{-1}

, (

N_A = 6\times10^{23}

). The activity of 1.0

\mu

g of the substance is ____________

\times10^{10}

Bq.

Official answer

NTA final key.

Chapter: Nuclei
Topic: Radioactive Decay
Idea tested: Activity and Rate of Decay

Same idea in other shifts

Asked 3× in all

26 Jul 2022, Shift 1 · Q33The disintegration rate of a certain radioactive sample at any instant is 4250 disintegrations per minute. 10 minutes later, the rate…MediumSingle correct
16 Mar 2021, Shift 2 · Q12The half-life of $\mathrm{Au^{198}}$ is 2.7 days. The activity of 1.50 mg of $\mathrm{Au^{198}}$ if its atomic weight is 198 g…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.