Question
Define the term 'activity' of radionuclide. Write its SI unit.
✓
Answer
The total decay rate of a sample of one or more radionuclide is called activity.
Alternate Answer
Radioactive disintegration taking place per second.Alternate
Answer$\text{R} = - \frac{\text{dN}}{\text{dt}} , $where N is the total number of radionuclides at any time ‘t’. SI unit-becquerel(Bq) .
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Suppose the tube in the previous problem is kept vertical with B upward. Water enters through B at the rate of 1cm3/s . Repeat parts (a), (b) and (c). Note that the speed decreases as the water falls down.
In which directions do the electric and magnetic field vectors oscillate in an electromagnetic wave propagating along the x-axis?
Under what condition is terminal voltage at the ends of a secondary cell is equal to its electromotive force?
Which part of electromagnetic spectrum does the wavelength 10-10m correspond to?
Why gold foil is used in $\alpha$-particle scattering experitment?
→32P beta-decays to 32S. Find the sum of the energy of the antineutrino and the kinetic energy of the $\beta$-particle. Neglect the recoil of the daughter nucleus. Atomic mass of 32P = 31.974u and that of 32S = 31.972u.
→Why, some definite lines of atomic spectrum of matter is obtained?
Answer the following question:
A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction, and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions with the environment?
A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction, and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions with the environment?
A conducting loop is held below a current carrying wire PQ as shown. Predict the direction of the induced current in the loop when the current in the wire is constantly increasing.
With increase in temperature, will the drift velocity of free electrons in a metallic conductor increase or decrease?