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Assertion (A): Intrinsic resistivity of silicon is lower than that of germanium. Reason (R): Magnitude of free electron concentration in germanium is more than that of silicon. | |
A. | Both A and R are true and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are true but R is not correct explanation of A [Wrong Answer] |
C. | A is true but R is false [Wrong Answer] |
D. | A is false but R is true [Correct Answer] |
View Answer
Explanation:-
Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ The dynamic equalising circuit consists of a series combination of capacitor C and resistor R_{C} across each thyristor. This resistance R_{C} (along with parallel connected diode)
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limits discharging current
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⇒ A uniform wave have components
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limits charging current
limits discharging current
limits both charging and discharging currents
none of the above
⇒ The current flowing through the resistance R in the circuit in the figure has the form 2 cos 4t, where
(0.18 + j0.72)
(0.46 + j1.90)
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⇒ Z flag is reset if an ALU operation results in 0.
TRUE
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⇒ Occasionally a discrete amplifier user RF chokes instead of collector resistors. Such amplifiers are inherently
low pass amplifiers
high pass amplifiers
band pass amplifiers
none of the above
⇒ A uniform wave have components
in the perpendicular direction E existing while H is zero
in the direction of propagation E existing while H is zero
E and H are zero in direction perpendicular to direction of propagation
E and H existing only in direction perpendicular to direction of propagation
⇒ DeMorgan's first theorem is =
A . A = 0
A = A
A + B = A . B
AB = A + B
⇒ Which one of the following power amplifier has the maximum efficiency?
Class A
Class B
Class AB
Class C
⇒ The value of the inductance of coil in which a current increases linearly from zero to 0.1A in 0.2 second producing a voltage of 5 volts is __________ .
2.5
5
10
20
⇒ The derating factor for a BJT transistor is about
0.5 mW/°C
2.5 mW/°C
10 mW/°C
25 mW/°C
⇒ A loss less transmission line is terminated in a load which reflects a part of the incident power. The measured VSWR is 2. The percentage of the power that is reflected back is
57.73
33.33
0.11
11.11
⇒ As per Boolean algebra, inputs can be interchanged in
OR gates
AND gates
both OR and AND gates
none of the above
⇒ The coding system generally used in digital telemetry is
PPM (Pulse position modulation)
PAM (Pulse amplitude modulation)
PCM (Pulse code modulation)
PDM (Pulse duration modulation)
⇒ The clear data and present input of the JK flip-flop are known as
direct inputs
synchronous inputs
indirect inputs
either direct inputs or synchronous inputs
⇒ Two RLC series circuit has same damping ratio. Circuit 1 has higher natural frequency as compared to circuit 2. Then
transients in circuit 2 will decay faster
transients in circuit 1 will decay faster
transients in both circuits will decay at the same rate
transients in any one may decay faster than in the other
⇒ It is required to increase the maximum range of a radar by a factor of two. The peak power transmitted in the radar system has to be increased by a factor of
2
4
8
16
⇒ System
causal
stable
non causal
anticausal
⇒ In figure V_{BE} = 0.7 V. If base current required to saturate the transistor is 0.1 mA, V_{i5 V5.7 V10 V10.7 V}
⇒ Which of the following is not a classification of programmed data transfer?
Synchronous transfer
Hand shaking
Interrupt driver transfer
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⇒ A transistor in CE mode is in saturation region. Then the collector is almost at
ground potential
a potential equal to V_{CC}
a potential equal to 0.5 V_{CC}
a potential equal to 2 V_{CC}
⇒ A full wave diode rectifier using centre tapped transformer has diodes with forward resistance of 50 ohms each. The load resistance of 50 ohms each. The load resistance is also 50 ohms. The voltage regulation is
0.2
0.5
1
2
⇒ In PCM, the quantization noise depends on
sampling rate
signal power
number of quantization level
signal energy
⇒ 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}
⇒ Choose correct option
var (X + Y) = Var (X) + Var (Y)
var (X - Y) = Var (X) + Var (Y)
var (X + Y) = Var (X) x Var (Y)
Both (a) and (b)
⇒ In a thyristor the gate current is increased, then
anode current will increase
anode current will decrease
anode current will remain constant
anode current may increase or decrease
⇒ For a periodic waveform, the power spectral density and correlation function form
a Laplace transform pair
a Fourier transform pair
either (a) or (b)
neither (a) nor (b)
⇒ The current I for the netw
0 mA
10.72 mA
10.94 mA
11.32 mA
⇒ Semiconductors have
aero temperature coefficient of resistance
positive temperature coefficient of resistance
negative temperature coefficient of resistance
none of the above
⇒ A TEM wave is incident normally on a perfect conductor. The E and H fields at boundary will respectively be
minimum and maximum
minimum and minimum
maximum and minimum
maximum and maximum
⇒ Two 16 : 1 and one 2 : 1 multiplexers can be connected to form a
16 : 1 multiplexer
32 : 1 multiplexer
64 : 1 multiplexer
8 : 1 multiplexer
⇒ If E (i.e., available energy state) = E_{F}(i.e., Fermi level), then probability that state E will be occupied is 0.5 for any temperature T.
TRUE
FALSE