MCQ
The phenomenon of radioactivity is
- AExothermic change which increases or decreases with temperature
- BIncreases on applied pressure
- ✓Nuclear process does not depend on external factors
- DNone of the above
✓
Answer
Correct option: C.
Nuclear process does not depend on external factors
c
(c) Radioactivity is natural phenomenon in which particles are emitted from nuclei as a result of nuclear instability and does not depend upon external factors. Because the nucleus experiences the intense conflict between the two strongest forces in nature, there are many nuclear isotopes which are unstable and emit some kind of radiation.
(c) Radioactivity is natural phenomenon in which particles are emitted from nuclei as a result of nuclear instability and does not depend upon external factors. Because the nucleus experiences the intense conflict between the two strongest forces in nature, there are many nuclear isotopes which are unstable and emit some kind of radiation.
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
Two particles $X$ and $Y$ having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii $R_1$ and $R_2$ respectively. The ratio of masses of $X$ to that of $Y$ is:
→The variation of wavelength $\lambda $ of the ${K_\alpha }$ line with atomic number $Z$ of the target is shown by the following curve of
→Magnitude of potential difference across L. C and R in a series LCR circuit is 100 V. If resistor is re- moved, then magnitude of current in the circuit is:
A carrier is simultaneously modulated by two sine waves with modulation indices of $0.4$ and $0.3$. The resultant modulation index will be
→The minimum wavelength of $X-$ rays produced in a coolidge tube operated at potential difference of $40 kV$ is.......$ \mathop A\limits^o $
→$X-$ rays were discovered by
→A battery of $e.m.f.$ $10\, V$ and internal resistance $0.5\, ohm$ is connected across a variable resistance $R$. The value of $R$ for which the power delivered in it is maximum is given by ......... $ohm$
→An observer on earth observes that wave length of spectral line in spectrum of a milky way shifts towards red end of spectrum. According to the observer, the milky-way is:
Figure $(a)$ shows plot of voltage across the capacitor as a function of the driving frequency for a sinusoidally driven electromagnetic oscillator $LCR$ circuit. Figure $(b)$ shows phase angle $\phi$ (phase difference between voltage and current) vs $\omega/\omega_0$ graph for same circuit, for three different quality factor graph $1, 2, 3$ of figure $(a)$ and each one can be matched by one of graphs $a, b, c$ also of figure $(b)$ :-
→Four charges are placed on corners of a square as shown in figure having side of $5\,cm$. If $Q$ is one microcoulomb, then electric field intensity at centre will be
→