MCQ
Energy generation in stars is mainly due to
  • A
    Chemical reactions
  • B
    Fission of heavy nuclei
  • Fusion of light nuclei
  • D
    Fusion of heavy nuclei

Answer

Correct option: C.
Fusion of light nuclei
c
(c) Energy of stars is due to the fusion of light hydrogen nuclei into $He$.

In this process much energy is released.

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

In the circuit shown in figure, each capacitor has a capacity of 3μF. The equivalent capacity between A and B is
In the circuit, if the forward voltage drop for the diode is 0.5V, the current will be
Which atom contains exactly $15$ neutrons?
A conducting ring of radius $'r$' is placed in a varying magnetic field perpendicular to the plane of the ring, the rate at which magnetic field varies is $x$ the electric field intensity at any point of the ring is
A ray of light incident normally on an isosceles right angled prism travels as shown in the figure. The least value of the refractive index of the prism must be
Which one of the following device makes use of the electrons to strike certain substances to produce fluorescence?
If the deBroglie wavelength of an electron is equal to $10^{-3}$ times the wavelength of a photon of frequency $6\,\times 10^{14}\,Hz,$ then the speed of electron is equal to: (Speed of light $=3\times 10^8\,m/s\,;$ Planck’s constant $=6.63\times 10^{-34}\,J.s\,;$ Mass of electron $=9.1\times 10^{-31}\,kg$ )
A transparent solid cylindrical rod has a refractive index of $\frac{4}{\sqrt {3}}$ It is surrounded by a medium of refractive index $2$. A light ray is incident at the mid-point of one end of the rod as shown in the figure.

The incident angle $\theta $ for which the light ray grazes along the wall of the rod is

The magnetic field of earth is due to
The figure shows an isosceles triangle wire frame with apex angle equal to $\pi /2$. The frame starts entering into the region of uniform magnetic field $B$ with constant velocity $v$ at $t= 0$. The longest side of the frame is perpendicular to the direction of velocity. If $i$ is the instantaneous current through the frame then choose the alternative showing the correct variation of $i$ with time.