Question

What is relation between following units:

Bq and Ci

• A. $1Ci=3.7\times {10}^{10}Bq$
• B. $1Ci=5.7\times {10}^{10}Bq$
• C. $1Ci=4.7\times {10}^{10}Bq$
• D. None of these

Answer 1

Answer: (A)

$1Ci=3.7\times {10}^{10}Bq$

`The unit of radioactivity of a substance is measured as the rate at which it changes into its daughter nucleus. It has been derived on the scale of disintegration of radium.

The SI unit of activity is dps i.e. disintegrations per second or Becquerel.

$1$ Curie ($\therefore 1$ Ci $=3.7\times {10}^{10}$ dps) = $3.7\times {10}^{10}$ dps = $3.7\times {10}^{10}$ becquerel = $3.7\times {10}^4$ Rutherford ($\therefore 1$ Rd $={10}^6$ dps)