- AGreater than that in a semiconductor.
- BLess than that in a good conductor.
- CGreater than that in a good conductor.
- DBoth (1) and (3) are true.
Explanation:
Glass is an insulator. The energy gap in a glass is greater than that of semiconductor and a good conductor.
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The rest mass of the photon is
|
(a) 0 |
(b) ∞ |
|
(c) Between 0 and ∞ |
(d) Equal to that of an electron |

If q is the charge per unit area on the surface of a conductor, then the electric field intensity at a point on the surface is
|
(a) |
(b) |
|
(c) |
(d) |
Two capacitors of capacities and
are charged to voltages
and
respectively. There will be no exchange of energy in connecting them in parallel, if
|
(a) |
(b) |
(c) |
(d) |
The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young’s double-slit experiment is
|
(a) Infinite |
(b) Five |
(c) Three |
(d) Zero |
Number of spectral lines in hydrogen atom is
|
(a) 3 |
(b) 6 |
(c) 15 |
(d) Infinite |