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Consider the following statements
| |
A. | 2 and 3 are correct [Wrong Answer] |
B. | 1 and 3 are correct [Wrong Answer] |
C. | 1 and 4 are correct [Correct Answer] |
D. | 3 and 4 are correct [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 :
⇒ Decimal 43 in hexadecimal and BCD number system is respectively.
B2, 01000011
2B, 01000011
2B, 00110100
B2, 01000100
⇒ The equivalent circuit of an op-amp has
a virtual ground at input
a virtual ground at output
virtual ground at input as well as at output
none of the above
⇒ Common emitter transistor has
high current and high voltage gain
low current gain and low voltage gain
high current gain and low voltage gain
low current and voltage gain
⇒ In Maxwell's bridge the unknown inductance is measured by comparing it with a standard capacitor.
TRUE
FALSE
⇒ In microstrip line has dielectric material most commonly used is
silicon
rubber
plastic
bakelite
⇒ To separate channels in FDM receiver we have to use
integration
AND gate
band pass filter
differentiation
⇒ In a resistance strain gauge, G = 2, stress = 1050 kg/cm^{2}, R = 1000 Ω. The value of ΔR will be
2 Ω
3 Ω
4 Ω
1 Ω
⇒ A quiescent state of a transistor implies
zero bias
no output
no distortion
no input signal
⇒ If VSWR is infinite, the transmission line is terminated in
short circuit
complex impedance
open circuit
either (a) or (c)
⇒ Burden of an instrument transformer is expressed in
A
V-A
Ω
watt
⇒ Pick the odd one out
PPM
PDM
PWM
PLM
⇒ The bidirectional pattern of a broadside array can be converted into unidirectional by
maintaining the distance of λ/4 between the elements
maintaining the distance of λ/2 between the elements
installing an identical array behind the main array at distance λ/4 and exciting it by current leading in phase by 90°
installing an identical array behind the main array at distance λ/2 and exciting it by current leading in phase by 120°
⇒ Low frequency boost can be easily compensated by
attenuating the frequencies from 0 to 1.25 MHz
using an appropriate de-emphasis circuit in the receiver
using an appropriate pre-emphasis circuit in the transmitter
none
⇒ A few minutes disturbance in space communications occurs twice a year during Sunblinding when __________ are in line.
Sun and satellite
Sun and Earth station
Satellite and Earth station
Sun, satellite and Earth station
⇒ In Bode plots, frequency is plotted on log scale.
TRUE
FALSE
⇒ The knee voltages in silicon and germanium diodes respectively are
0.3 V and 0.7 V
0.7 V and 0.3 V
0.7 V each
0.3 V each
⇒ Binary 1111 when added to binary 11111, the result in binary is
111111
1111
1000
10000
⇒ In the above case the hexadecimal notation for the last memory location is
0
FFFF
3FFF
5FFF
⇒ The current i(t), though a 10 Ω resistor in series with an inductance, is given by i(t) = 3 + 4 sin (10t + 45°) + 4 sin (300t + 60°) Amperes. The RMS value of the current and the power dissipated in the circuit are
41 A, 410 W, respectively
35 A, 350 W, respectively
5 A, 250 W, respectively
11 A, 1210 W, respectively
⇒ Frequency shifting keying is basically a method involving
amplitude modulation
frequency modulation
phase modulation
none of the above
⇒ A voltage v(t) which is a gaussian ergodic random process witha mean of zero and a varance of 4 volt^{2} is measured by a meter which first square and then reads its dc component. The reading will be
0
4
16
2
⇒ A circuit said to be lumped when physical dimensions of all the component are __________ .
greater compared with wavelength of electromagnetic signal
small compared with wavelength electromagnetic signal
negligible compared with wavelength of electromagnetic signal
equal compared with wavelength of electromagnetic signal
⇒ In figure I_{D} = 4 mA. Then V_{GS4.4 V-4.4 V0.44 V-0.44 V}
⇒ For BJT transistor. The maximum power dissipation is specified as 350 mW if ambient temperature is 25°C. If ambient temperature is 60°C the maximum power dissipation should be limited to about
100 mW
250 mW
450 mW
600 mW
⇒ Which of the following circuits cannot be demodulate SSB?
Product detector
Balanced modulator
Phase discriminator
BFO
⇒ If a sheet of a mica is inserted between the plates of an air capacitor, the capacitance
will increase
will return the same
will decrease
may increase or decrease
⇒
A-1, B-2, C-3, D-4
A-2, B-3, C-1, D-4
A-4, B-3, C-2, D-1
A-2, B-3, C-4, D-1
⇒ An op-amp is fed from a signal source through resistance R_{1}. If it is to work as sign changer, the feedback resistance R_{f} should be
equal to R_{1}
twice R_{1}
half R_{1}
either (b) or (c)
⇒ For a series circuit of variable R and X_{L}, the impedance locus is
a straight line parallel to X axis in first quadrant
a straight line parallel to X axis in fourth quadrant
a straight line parallel to Y axis in second quadrant
a straight line parallel to Y axis in first quadrant
⇒ The effective height of an antenna is slightly greater than physical height because
wave velocity in conductor is less than its velocity in free space
wave velocity in conductor is more than its velocity in free space
resistance of conductor is less than that of free space
none of the above
⇒ Decimal 43 in hexadecimal and BCD number system is respectively.
B2, 01000011
2B, 01000011
2B, 00110100
B2, 01000100
⇒ The equivalent circuit of an op-amp has
a virtual ground at input
a virtual ground at output
virtual ground at input as well as at output
none of the above
⇒ Common emitter transistor has
high current and high voltage gain
low current gain and low voltage gain
high current gain and low voltage gain
low current and voltage gain
⇒ In Maxwell's bridge the unknown inductance is measured by comparing it with a standard capacitor.
TRUE
FALSE
⇒ In microstrip line has dielectric material most commonly used is
silicon
rubber
plastic
bakelite
⇒ To separate channels in FDM receiver we have to use
integration
AND gate
band pass filter
differentiation
⇒ In a resistance strain gauge, G = 2, stress = 1050 kg/cm^{2}, R = 1000 Ω. The value of ΔR will be
2 Ω
3 Ω
4 Ω
1 Ω
⇒ A quiescent state of a transistor implies
zero bias
no output
no distortion
no input signal
⇒ If VSWR is infinite, the transmission line is terminated in
short circuit
complex impedance
open circuit
either (a) or (c)
⇒ Burden of an instrument transformer is expressed in
A
V-A
Ω
watt
⇒ Pick the odd one out
PPM
PDM
PWM
PLM
⇒ The bidirectional pattern of a broadside array can be converted into unidirectional by
maintaining the distance of λ/4 between the elements
maintaining the distance of λ/2 between the elements
installing an identical array behind the main array at distance λ/4 and exciting it by current leading in phase by 90°
installing an identical array behind the main array at distance λ/2 and exciting it by current leading in phase by 120°
⇒ Low frequency boost can be easily compensated by
attenuating the frequencies from 0 to 1.25 MHz
using an appropriate de-emphasis circuit in the receiver
using an appropriate pre-emphasis circuit in the transmitter
none
⇒ A few minutes disturbance in space communications occurs twice a year during Sunblinding when __________ are in line.
Sun and satellite
Sun and Earth station
Satellite and Earth station
Sun, satellite and Earth station
⇒ In Bode plots, frequency is plotted on log scale.
TRUE
FALSE
⇒ The knee voltages in silicon and germanium diodes respectively are
0.3 V and 0.7 V
0.7 V and 0.3 V
0.7 V each
0.3 V each
⇒ Binary 1111 when added to binary 11111, the result in binary is
111111
1111
1000
10000
⇒ In the above case the hexadecimal notation for the last memory location is
0
FFFF
3FFF
5FFF
⇒ The current i(t), though a 10 Ω resistor in series with an inductance, is given by i(t) = 3 + 4 sin (10t + 45°) + 4 sin (300t + 60°) Amperes. The RMS value of the current and the power dissipated in the circuit are
41 A, 410 W, respectively
35 A, 350 W, respectively
5 A, 250 W, respectively
11 A, 1210 W, respectively
⇒ Frequency shifting keying is basically a method involving
amplitude modulation
frequency modulation
phase modulation
none of the above
⇒ A voltage v(t) which is a gaussian ergodic random process witha mean of zero and a varance of 4 volt^{2} is measured by a meter which first square and then reads its dc component. The reading will be
0
4
16
2
⇒ A circuit said to be lumped when physical dimensions of all the component are __________ .
greater compared with wavelength of electromagnetic signal
small compared with wavelength electromagnetic signal
negligible compared with wavelength of electromagnetic signal
equal compared with wavelength of electromagnetic signal
⇒ In figure I_{D} = 4 mA. Then V_{GS4.4 V-4.4 V0.44 V-0.44 V}
⇒ For BJT transistor. The maximum power dissipation is specified as 350 mW if ambient temperature is 25°C. If ambient temperature is 60°C the maximum power dissipation should be limited to about
100 mW
250 mW
450 mW
600 mW
⇒ Which of the following circuits cannot be demodulate SSB?
Product detector
Balanced modulator
Phase discriminator
BFO
⇒ If a sheet of a mica is inserted between the plates of an air capacitor, the capacitance
will increase
will return the same
will decrease
may increase or decrease
⇒
Match the following:
List I (Operation in Basic) | List II (Priority) | ||
---|---|---|---|
A. | Exponentiation | 1. | 1 |
B. | Multiplication and division | 2. | 2 |
C. | Addition and subtraction | 3. | 3 |
D. | Expression within parenthesis | 4. | 4 |
A-1, B-2, C-3, D-4
A-2, B-3, C-1, D-4
A-4, B-3, C-2, D-1
A-2, B-3, C-4, D-1
⇒ An op-amp is fed from a signal source through resistance R_{1}. If it is to work as sign changer, the feedback resistance R_{f} should be
equal to R_{1}
twice R_{1}
half R_{1}
either (b) or (c)
⇒ For a series circuit of variable R and X_{L}, the impedance locus is
a straight line parallel to X axis in first quadrant
a straight line parallel to X axis in fourth quadrant
a straight line parallel to Y axis in second quadrant
a straight line parallel to Y axis in first quadrant
⇒ The effective height of an antenna is slightly greater than physical height because
wave velocity in conductor is less than its velocity in free space
wave velocity in conductor is more than its velocity in free space
resistance of conductor is less than that of free space
none of the above