- A[L T A].
- B[L-1 T A].
- C[L-2 T A].
- D[L-3 T A].
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The attenuation in optical fibre is mainly due to
|
(a) Absorption |
(b) Scattering |
|
(c) Neither absorption nor scattering |
(d) Both (a) and (b) |
The log-log graph between the energy E of an electron and its de-Broglie wavelength λ will be
|
(a)
|
(a)
|
(c)
|
(d)
|
Two positive charges of 20 coulomb and Q coulomb are situated at a distance of 60 cm. The neutral point between them is at a distance of 20 cm from the 20 coulomb charge. Charge Q is
|
(a) 30 C |
(b) 40 C |
(c) 60 C |
(d) 80 C |
Blue colour of sky is due to:
On increasing the temperature of a conductor, its resistance increases because
|
(a) Relaxation time decreases |
(b) Mass of the electrons increases |
|
(c) Electron density decreases |
(d) None of the above |
For a crystal system, a = b = c, a = b = g ¹ 90o, the system is
|
(a) Tetragonal system |
(b) Cubic system |
|
(c) Orthorhombic system |
(d) Rhombohedral system |