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Hall effect can be used to find the type of semiconductor. | |
A. | TRUE [Correct Answer] |
B. | FALSE [Wrong Answer] |
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Explanation:-
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⇒ A 3 phase semiconverter when supplying a certain load has a rectification efficiency of 0.6 and transformer utilisation factor of 0.35. When a 3 phase full converter is supplying the same load
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it is slower than software
it is not possible to perform floating point addition by hardware
of not specific reason
⇒ Half wave sysmmetry means f(t) = - f(t ± T/2).
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⇒ The affect of ground on radiation pattern is to
cause cancellation of radiation along the ground
produce more number of nulls
both (a) and (b)
either (a) or (b)
⇒ For maximum output the width of air gap of audio head should be
equal to wavelength
half the wavelength
one quarter the wavelength
very small as compared to wavelength
⇒ A zinc carbon cell is a primary cell.
TRUE
FALSE
⇒ Four terminal approach is used in measuring low resistance because it
eliminates thermoelectric energy
eliminates stray capacitance
eliminates stray inductance
eliminates the effect of leads and contacts
⇒ Which TM mode in rectangular waveguide has lowest cutoff frequency?
TM_{11}
TM_{01}
TM_{10}
TM_{21}
⇒ The output of a diode detector contains
D.C. voltage
modulating signal
RF ripple
all of the above
⇒ The impulse response h[n] of a linear time invariant system is given by h[n] = ∪[n + 3 ] + ∪[n - 2] -2∪[n -7]. The above system is
stable but non-casual
stable and casual
casual but unstable
unstable and not casual
⇒ A circuit is fed by two sources of the same frequency and values 100 ∠0° V and 20 ∠30°V. The current in a particular branch is 5 ∠19° A. If the magnitudes of the sources and changed to 200 ∠0° V and 40 ∠30° V, the current in that branch should be
5 ∠19° A
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⇒ An electrically neutral semiconductor has
no free charges
no majority carriers
no minority carriers
equal number of positive and negative charges
⇒ 2N 2430 could be a
semi-conductor diode
dual gate MOSFET
BJT
UJT
⇒ Chrome signals in PAL colour television system consist of
R - Y and B - Y signal
V and U signals
I and Q signals
R - Y and G - Y signals
⇒ A capacitor having capacitance C is raised to voltage V. The energy stored will be
CV^{2}
V^{2}/C
0.5 V^{2}C
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⇒ A rare gas has N atoms per m^{3}. If electronic polarizability of single atom of this gas is a_{e}, then
∈_{r} = Na_{e}
∈_{0}∈_{r} = Na_{e}
∈_{0}(∈_{r} - 1) = Na_{e}
∈_{0}(∈_{r} - 2) = Na_{e}
⇒ The voltage transfer functions of two port circuits connected in cascade can be easily found from
product of individual ABCD matrices
product of voltage transfer functions of two networks
sum of z matrices
sum of h matrices
⇒ Binary 1111 when added to binary 11111, the result in binary is
111111
1111
1000
10000
⇒ In computers the size of secondary memory is usually much larger than that of primary memory.
TRUE
FALSE
⇒ Inverters find applications in
HVDC transmission
UPS
variable speed ac drives
all of the above
⇒ Which circuit is called swamped amplifier?
CC
CE
CB
Both (a) and (b)
⇒ The normalised form of 0.0152 x 10^{18} is
0.152 x 10^{17}
1.52 x 10^{16}
15.2 x 10^{15}
152 x 10^{14}
⇒ The pole zero plot of the given figure is
non-minimum phase function
minimum phase function
all pass function
either (b) or (c)
⇒ If a RAM has 34 bits in its MAR and 16 bits in its MDR, then its capacity will be
32 GB
16 GB
32 MB
16 MB
⇒ A TV picture is to be transmitted over a channel of 6 MHz bandwidth at a 35 dB S/N ratio. The capacity of the channel is
50 Mbps
100 Mbps
36 Mbps
72 Mbps