Download App

Nuclei — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsNuclei1 Mark
MCQ
Fusion reaction take place at high temperature because:
  • A
    Atoms are ionized at high temperature.
  • B
    Molecules break up at high temperatures.
  • C
    Nuclei break up at high temperature.
  • ✓
    Kinetic energy is high enough to overcome repulsion between nuclei.
✓

Answer

Correct option: D.
Kinetic energy is high enough to overcome repulsion between nuclei.

Fusion reaction takes place at temperature about $10^7K.$
It requires this high temperature so that nucleus are moving rapidly, so that they have high kinetic energy and can come together by overcoming repulsion between them.

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

Explore more

More "M.C.Q (1 Marks)" from Nuclei→Nuclei — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

If a charge $q$ is placed at the centre of a closed hemispherical non-conducting surface, the total flux passing through the flat surface would be
→
A beam of light from a source $L$ is incident normally on a plane mirror fixed at a certain distance $x$ from the source. The beam is reflected back as a spot on a scale placed just above the source $L.$ When the mirror is rotated through a small angle $\theta$, the spot of the light is found to move through a distance $y$ on the scale. The angle $\theta$ is given by
→
In Milikan's oil drop experiment, a charged drop falls with terminal velocity V. If an electric field E is applied in vertically upward direction then it starts moving in upward direction with terminal velocity 2V. If magnitude of electric field is decreased to $\frac{\mathrm{E}}{2}$, then terminal velocity will become
→
The equivalent resistance across $AB$ would be ............ $\Omega$
→
Which one of the following is true in photoelectric emission
→
Two capacitors of capacities ${C_1}$ and ${C_2}$ are charged to voltages ${V_1}$ and ${V_2}$ respectively. There will be no exchange of energy in connecting them in parallel, if
→
The ratio of powers dissipatted respectively in $R$ and $3R$, as shown is:
→
In a Young's double-slit experiment, let $A$ and $B$ be the two slits. $A$ thin film of thickness $t$ and refractive index $\mu$ is placed in front of $A$. Let $\beta =$ fringe width., films of thicknesses $t_A$ and $t_B$ and refractive indices $\mu_A$ and $\mu_B$, are placed in front of $A$ and $B$ respectively. If $\mu_At_A = \mu_Bt_B$, the central maximum will :
→
A electron experiences a force $\left( {4.0\,\hat i + 3.0\,\hat j} \right)\times 10^{-13} N$ in a uniform magnetic field when its velocity is $2.5\,\hat k \times \,{10^7} ms^{-1}$. When the velocity is redirected and becomes $\left( {1.5\,\hat i - 2.0\,\hat j} \right) \times {10^7}$, the magnetic force of the electron is zero. The magnetic field $\vec B$ is :
→
Which of the following helps us in the determination of the temperature of sun
→