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The number of free electrons in acceptor atom is  
A.  1 [Wrong Answer] 
B.  2 [Wrong Answer] 
C.  3 [Correct Answer] 
D.  4 [Wrong Answer] 
View Answer
Explanation:
Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result 
Also Read Similar Questions Below :
⇒ In the full adder, denoting Sum by S and carry by C
S = 1 when two or more inputs are unity
C = 1 when two or more inputs are unity
C = 1 when all the inputs are unity
S = 1 when all the inputs are unity
⇒ In figure the total inductance of the circui
L_{1} + L_{2}
L_{1} + L_{2} + M
L_{1} + L_{2} + 2M
L_{1} + L_{2} + M
⇒ Two discrete time systems with impulse responses h_{1}[n] = δ[n  1] and h_{2}[n] = δ[n  2] are connected in cascade. The overall impulse response of the cascaded system is
δ[n  1] + δ[n  2]
δ[n  4]
δ[n  3]
δ[n  1] + δ[n  2]
⇒ Maximum power from a source having internal resistance R_{i} is delivered to a resistive load R_{L}, if
R_{i} > R_{L}
R_{i} < R_{L}
R_{i} = R_{L}^{2}
R_{i} = R_{L}
⇒ Thyristors can be used for control of
dc separately excited motor
dc shunt motor
dc series motor
all of the above
⇒ Effective Q of the equivalent electrical circuit of quartz crystal is of the order of
200
2000
20000
200000
⇒ The residual resistivity of a binary alloy at 0°K is
the sum of the residual resistivities of the component metals
the difference of the residual resistivities of the component metals
the product of the residual resistivities of the component metals
depend on the concentration of the minor component in the alloy
⇒ What binary number does second row represent?
1111001
1010101
10101010
11101010
⇒ Cross talk is due to reception of portions of a signal from one channel into another.
TRUE
FALSE
⇒ Which of the following integer expressions is incorrect in Pascal?
⇒ When a communication satellite passes into Earth's shadow, its temperature drops to about __________ ° K.
273
243
170
123
⇒ The function δ' (tb) is
a step function originating at t = b
an impulse function originating at t = b
a unit doublet originating at = t  b
none of the above
⇒ In Java which operator can be used even if there is a single operand
+

*
%
⇒ In waveguides the existing waves are
TE only
TM only
both (a) and (b)
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⇒ A transmission line terminates in two branches, each of length λ/4, as shown. The branches are terminated by 50Ω loads. The lines are lossless and have the characteristics impedances shown. Determine the impedance Z_{1} as seen by the so
200Ω
100Ω
50Ω
25Ω
⇒ In a 3 phase full converter, the instantaneous output voltage can have negative part if
firing angle is less than 60°
firing angle is less than 90°
firing angle is more than 60°
firing angle is more than 90°
⇒ The maximum effective aperture of a microwave antenna which has a directivity of 900, will be
71.619 λ^{2}
716.19 λ^{2}
7161.9 λ^{2}
71619 λ^{2}
⇒ A tachometer has a sensitivity of 4 V/1000 rpm. Express the gain constant of the tachometer in the units volts/(rad/sec).
0.0489
0.0381
2
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⇒ In a rectifier circuit the filter capacitance is increased. Then the ripple will
increase
decrease
remain the same
either (a) or (b)
⇒ Energy density function is always
even
odd
neither even nor odd
both (a) and (b)
⇒ The h parameter h_{11} is the same in CE and CC circuit.
TRUE
FALSE
⇒ The time constant of the circuit after the switch shown in the figure is opene
0.2 s
5 s
0.1 s
dependent on R and hence cannot be determined unless R is known
⇒ If 100 V is the peak voltage across the secondary of the transformer in a halfwave rectifier (without any filter circuit), then the maximum voltage on the reversebiased diode is
200 V
141.4 V
100 V
86 V
⇒ A/D parallel converter is also called flash converter.
TRUE
FALSE
⇒ The type of feedback in the following circuit diag
Voltage shunt
Currentshunt
Voltage series
Current series
⇒ 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
⇒ Schrodinger wave equation is partial differential equation.
TRUE
FALSE
⇒ In pulse code modulation, if the signal is sampled at the rate of f and the number of pulses in one code group is p, then the number of pulses per second will be
p/f
f/p
1/pf
pf
⇒ A coaxial line has L = 500 nH/m and C = 50 pF/m. The characteristic impedance is
500 Ω
250 Ω
100 Ω
50 Ω
⇒ A class D chopper
can operate in first quadrant only
can operate in second quadrant only
can operate in either first or fourth quadrant
can operate in all the quadrants
⇒ In the full adder, denoting Sum by S and carry by C
S = 1 when two or more inputs are unity
C = 1 when two or more inputs are unity
C = 1 when all the inputs are unity
S = 1 when all the inputs are unity
⇒ In figure the total inductance of the circui
L_{1} + L_{2}
L_{1} + L_{2} + M
L_{1} + L_{2} + 2M
L_{1} + L_{2} + M
⇒ Two discrete time systems with impulse responses h_{1}[n] = δ[n  1] and h_{2}[n] = δ[n  2] are connected in cascade. The overall impulse response of the cascaded system is
δ[n  1] + δ[n  2]
δ[n  4]
δ[n  3]
δ[n  1] + δ[n  2]
⇒ Maximum power from a source having internal resistance R_{i} is delivered to a resistive load R_{L}, if
R_{i} > R_{L}
R_{i} < R_{L}
R_{i} = R_{L}^{2}
R_{i} = R_{L}
⇒ Thyristors can be used for control of
dc separately excited motor
dc shunt motor
dc series motor
all of the above
⇒ Effective Q of the equivalent electrical circuit of quartz crystal is of the order of
200
2000
20000
200000
⇒ The residual resistivity of a binary alloy at 0°K is
the sum of the residual resistivities of the component metals
the difference of the residual resistivities of the component metals
the product of the residual resistivities of the component metals
depend on the concentration of the minor component in the alloy
⇒ What binary number does second row represent?
1111001
1010101
10101010
11101010
⇒ Cross talk is due to reception of portions of a signal from one channel into another.
TRUE
FALSE
⇒ Which of the following integer expressions is incorrect in Pascal?
L div M + P
A * * B
A div B  C
A mod B
⇒ When a communication satellite passes into Earth's shadow, its temperature drops to about __________ ° K.
273
243
170
123
⇒ The function δ' (tb) is
a step function originating at t = b
an impulse function originating at t = b
a unit doublet originating at = t  b
none of the above
⇒ In Java which operator can be used even if there is a single operand
+

*
%
⇒ In waveguides the existing waves are
TE only
TM only
both (a) and (b)
all of the above
⇒ A transmission line terminates in two branches, each of length λ/4, as shown. The branches are terminated by 50Ω loads. The lines are lossless and have the characteristics impedances shown. Determine the impedance Z_{1} as seen by the so
200Ω
100Ω
50Ω
25Ω
⇒ In a 3 phase full converter, the instantaneous output voltage can have negative part if
firing angle is less than 60°
firing angle is less than 90°
firing angle is more than 60°
firing angle is more than 90°
⇒ The maximum effective aperture of a microwave antenna which has a directivity of 900, will be
71.619 λ^{2}
716.19 λ^{2}
7161.9 λ^{2}
71619 λ^{2}
⇒ A tachometer has a sensitivity of 4 V/1000 rpm. Express the gain constant of the tachometer in the units volts/(rad/sec).
0.0489
0.0381
2
none of these
⇒ In a rectifier circuit the filter capacitance is increased. Then the ripple will
increase
decrease
remain the same
either (a) or (b)
⇒ Energy density function is always
even
odd
neither even nor odd
both (a) and (b)
⇒ The h parameter h_{11} is the same in CE and CC circuit.
TRUE
FALSE
⇒ The time constant of the circuit after the switch shown in the figure is opene
0.2 s
5 s
0.1 s
dependent on R and hence cannot be determined unless R is known
⇒ If 100 V is the peak voltage across the secondary of the transformer in a halfwave rectifier (without any filter circuit), then the maximum voltage on the reversebiased diode is
200 V
141.4 V
100 V
86 V
⇒ A/D parallel converter is also called flash converter.
TRUE
FALSE
⇒ The type of feedback in the following circuit diag
Voltage shunt
Currentshunt
Voltage series
Current series
⇒ 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
⇒ Schrodinger wave equation is partial differential equation.
TRUE
FALSE
⇒ In pulse code modulation, if the signal is sampled at the rate of f and the number of pulses in one code group is p, then the number of pulses per second will be
p/f
f/p
1/pf
pf
⇒ A coaxial line has L = 500 nH/m and C = 50 pF/m. The characteristic impedance is
500 Ω
250 Ω
100 Ω
50 Ω
⇒ A class D chopper
can operate in first quadrant only
can operate in second quadrant only
can operate in either first or fourth quadrant
can operate in all the quadrants