MCQ
Activity of a radioactive substance can be represented by various unit. Select correct option
  • A
    $1\ dps$ = $10^6\ Bq$
  • $1\ Ci$ = $3.7×10^{10}\ dps$
  • C
    $1\ Ci$ = $1\ Bq$
  • D
    $1\ Bq$ = $10^6\ Rd$

Answer

Correct option: B.
$1\ Ci$ = $3.7×10^{10}\ dps$
b

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A bomb explodes at time $t=0$ in a uniform, isotropic medium of density $\rho$ and releases energy $E$, generating a spherical blast wave. The radius $R$ of this blast wave varies with time $t$ as
Two wooden blocks are moving on a smooth horizontal surface such that the block of mass $m$ remains stationary with respect to block of mass $M$ as shown in the figure. The magnitude of force $P$ is 
A network of four capacitors of capacity equal to ${C_1} = C,\,\,{C_2} = 2C,\,{C_3} = 3C$ and ${C_4} = 4C$ are conducted in a battery as shown in the figure. The ratio of the charges on ${C_2}$ and ${C_4}$ is
A bomb is projected with $200\,m/s$ at an angle $60^o$ with horizontal. At the highest point, it explodes into three particles of equal masses. One goes vertically upward with velocity $100\,m/sec,$ second particle goes vertically downward with the same velocity as the first. Then what is the velocity of the third one
In order to shift a body of mass $m$ from a circular orbit of radius $3R$ to a higher radius $5R$ around the earth, the work done is
Roads are banked on curves so that
A wire is loaded by $6\, kg$ at its one end, the increase in length is $12\, mm.$ If the radius of the wire is doubled and all other magnitudes are unchanged, then increase in length will be ......... $mm$
A wave travels on a light string.The equation of the wave is $Y = A \,\sin \,(kx -  \omega t + 30^o)$.It is reflected from a heavy string tied to an end of the light string at $x = 0$. If $64\%$ of the incident energy is reflected the equation of the reflected wave is
A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizontal reaches $30^o$, the box starts to slip and slides $4.0\, m$ down the plank in $4.0\,s$. The coefficients of static and kinetic friction between the box and the plank will be, respectively
The volume of a gas at $20°C$ is $100 \,cm^3$ at normal pressure. If it is heated to $100°C$, its volume becomes $125\, cm^3$ at the same pressure, then volume coefficient of the gas at normal pressure is