- AAre available universally.
- BCan be combined to produce OR, AND and NOT gates.
- CAre widely used in Integrated circuit packages.
- DAre easiest to manufacture.
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In a triode amplifier, the value of maximum gain is equal to
|
(a) Half the amplification factor |
(b) Amplification factor |
|
(c) Twice the amplification factor |
(d) Infinity |
The spectrum of light emitted by a glowing solid is
|
(a) Continuous spectrum |
(b) Line spectrum |
(c) Band spectrum |
(d) Absorption spectrum |
An e.m.f. of 100 millivolts is induced in a coil when the current in another nearby coil becomes 10 ampere from zero in 0.1 second. The coefficient of mutual induction between the two coils will be
|
(a) 1 millihenry |
(b) 10 millihenry |
(c) 100 millihenry |
(d) 1000 millihenry |
A coil is wound as a transformer of rectangular cross-section. If all the linear dimensions of the transformer are increased by a factor 2 and the number of turns per unit length of the coil remain the same, the self inductance increased by a factor of
|
(a) 16 |
(b) 12 |
(c) 8 |
(d) 4 |
Two spherical conductors B and C having equal radii and carrying equal charges in them repel each other with a force F when kept apart at some distance. A third spherical conductor having same radius as that of B but uncharged is brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion between B and C is
|
(a) F/4 |
(b) 3F/4 |
(c) F/8 |
(d) 3F/ 8 |
The angle of polarisation for any medium is 60o, what will be critical angle for this
|
(a) |
(b) |
(c) |
(d) |
The wavelength of the most energetic X–ray emitted when a metal target is bombarded by 100 KeV electrons is approximately
| (a) 12 Å | (b) 4 Å |
(c) 0.31 Å |
(d) 0.124 Å |
If aperture of lens is halved then image will be
|
(a) No effect on size |
(b) Intensity of image decreases |
|
(c) Both (a) and (b) |
(d) None of these |