MCQ
During a negative beta decay:
  • A
    An atomic electron is ejected.
  • B
    An electron which is already present within the nucleus is ejected.
  • A neutron in the nucleus decays emitting an electron.
  • D
    A proton in the nucleus decays emitting an electron.

Answer

Correct option: C.
A neutron in the nucleus decays emitting an electron.

Negative beta decay is given as
$\text{n}\rightarrow\text{p + e}^-+\bar{\text{v}}$
Neutron decays to produce proton, electron and anti$-$neutrino.

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

The photoelectric threshold wavelength of silver is $3250 \times 10^{-10} m$ . The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength $2536 \times 10^{-10} m$ is (Given $ h= 4.14 \times 10^{-15} eV s$  and $c = 3 \times 10^8 \,m s^{-1}$) 
In Young’s double slit experiment, a minimum is obtained when the phase difference of super imposing waves is
Electromagnets are made of soft iron because soft iron has:
The mass of a photo electron is
A wire has a resistance of 12 ohm. It is bent in the form of equilateral triangle. The effective resistance between any two corners of the triangle is
An electron is travelling in east direction and a magnetic field is applied in upward direction then electron will deflect in
Focal length of a convex lens of refractive index 1.5 is 2 cm. Focal length of lens when immersed in a liquid of refractive index of 1.25 will be
Consider the arrangement shown in figure. The total energy stored is $U_1$ when key is closed. Now the key $K$ is made off (opened) and two dielectric slabs of relative permittivity ${ \in _r}$ are introduced between the plates of the two capacitors. The slab tightly fit in between the plates. The total energy stored is now $U_2$. Then the ratio of $U_1/U_2$ is
A sphere can roll on a surface inclined at an angle $\theta$ if the friction coefficient is more than $\frac{2}{7}\text{g}\tan \theta.$ Suppose the friction coefficient is $\frac{1}{7}\text{g}\tan \theta.$ If a sphere is released from rest on the incline:
In optical fibre, refractive index of inner part is $1.68$ and refractive index of outer part is $1.44$. The numerical aperture of the fibre is ........