Which of the following Statements is correct?
Which of the following Statements is correct?
- [AIEEE 2012]
- A
The rate of radioactive decay cannot be controlled but that of nuclear fission can be controlled
- B
Nuclear forces are short range, attractive and charge dependent
- C
Nuclei of atoms having same number of neutrons are known as isobars.
- D
Wavelength of matter waves is given by de Broglie formula but that of photons is not given by the same formula
Similar Questions
A radioactive nucleus $A$ with a half life $T$, decays into a nucleus $B.$ At $t = 0$, there is no nucleus $B$. At sometime $t$, the ratio of the number of $B$ to that of $A$ is $0.3$. Then, $t$ is given by
A radioactive nucleus $A$ with a half life $T$, decays into a nucleus $B.$ At $t = 0$, there is no nucleus $B$. At sometime $t$, the ratio of the number of $B$ to that of $A$ is $0.3$. Then, $t$ is given by
- [JEE MAIN 2017]
A source contains two phosphorous radio nuclides $_{15}^{32} P \left(T_{1 / 2}=14.3 d \right)$ and $_{15}^{33} P \left(T_{1 / 2}=25.3 d \right) .$ Initially, $10 \%$ of the decays come from $_{15}^{33} P$ How long one must wait until $90 \%$ do so?
A source contains two phosphorous radio nuclides $_{15}^{32} P \left(T_{1 / 2}=14.3 d \right)$ and $_{15}^{33} P \left(T_{1 / 2}=25.3 d \right) .$ Initially, $10 \%$ of the decays come from $_{15}^{33} P$ How long one must wait until $90 \%$ do so?
Curie is a unit of
Curie is a unit of
- [AIPMT 1989]
Half life of radioactive element depends upon
Half life of radioactive element depends upon
If a radioactive substance reduces to $\frac{1}{{16}}$ of its original mass in $40$ days, what is its half-life .........$days$
If a radioactive substance reduces to $\frac{1}{{16}}$ of its original mass in $40$ days, what is its half-life .........$days$
- [AIIMS 2003]