- A0.782 MeV
- B0.782 eV
- C78.2 MeV
- D0
Explanation:
For neutron decay, some mass disappears as neutrons convert to a proton, electron and antineutrino.
Q = (mn−mp−mνˉ−me)c2 = 0.782MeV
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
When light is incident on a diffraction grating the zero order principal maximum will be
|
(a) One of the component colours |
(b) Absent |
|
(c) Spectrum of the colours |
(d) White |
Two charge + q and -q are situated at a certain distance. At the point exactly midway between them
|
(a) Electric field and potential both are zero |
|
(b) Electric field is zero but potential is not zero |
|
(c) Electric field is not zero but potential is zero |
|
(d) Neither electric field nor potential is zero |
The diagram of a logic circuit is given below. The output F of the circuit is represented by

|
(a) W.(X + Y) |
(b) W.(X.Y) |
(c) W + (X.Y) |
(d) W + (X + Y) |
If the wavelength of light is 4000 Å, then the number of waves in 1 mm length will be
|
(a) 25 |
(b) 0.25 |
(c) 0.25 |
(d) 25 |