Which logic gate is represented by following diagram
|
(a) AND |
(b) OR |
(c) NOR |
(d) XOR |
Which logic gate is represented by following diagram
|
(a) AND |
(b) OR |
(c) NOR |
(d) XOR |
(a) AND
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The distance between a proton and electron both having a charge 1.6 of a hydrogen atom is
. The value of intensity of electric field produced on electron due to proton will be
|
(a) 2.304 |
(b) 14.4 V/m |
(c) 16 V/m |
(d) 1.44 |
While a collector to emitter voltage is constant in a transistor, the collector current changes by 8.2 mA when the emitter current changes by 8.3 mA. The value of forward current ratio hfe is
|
(a) 82 |
(b) 83 |
(c) 8.2 |
(d) 8.3 |
Minimum energy required to takeout the only one electron from ground state of
is
|
(a) 13.6 eV |
(b) 54.4 eV |
(c) 27.2 eV |
(d) 6.8 eV |
The magnetic field at the centre of a circular coil of radius r carrying current I is
. The field at the centre of another coil of radius 2 r carrying same current I is
. The ratio
is
|
(a) |
(b) 1 |
(c) 2 |
(d) 4 |
In an interference experiment, the spacing between successive maxima or minima is (Where the symbols have their usual meanings)
|
(a) |
(b) |
(c) |
(d) |
The half-life of a sample of a radioactive substance is 1 hour. If 8
atoms are present at t = 0, then the number of atoms decayed in the duration t = 2 hour to t = 4 hour will be
|
(a) 2 |
(b) 1.5 |
(c) Zero |
(d) Infinity |