- 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.

In L-R circuit, for the case of increasing current, the magnitude of current can be calculated by using the formula
|
(a) |
(b) |
(c) |
(d) |
A condenser having a capacity of 6mF is charged to 100 V and is then joined to an uncharged condenser of 14 μF and then removed. The ratio of the charges on 6mF and 14mF and the potential of 6mF will be
|
(a) |
(b) |
(c) |
(d) |
In a concave mirror experiment, an object is placed at a distance from the focus and the image is formed at a distance
from the focus. The focal length of the mirror would be
|
(a) |
(b) |
(c) |
(d) |
A certain charge liberates 0.8 gm of
. The same charge will liberate how many gm of silver
|
(a) 108 gm |
(b) 10.8 gm |
(c) 0.8 gm |
(d) |
Speed of light is maximum in
|
(a) Water |
(b) Air |
(c) Glass |
(d) Diamond |