Users Also Read
MCQ's Search Engine
Electrical Engineering
Mechanical Engineering
Civil Engineering
Automobile Engineering
Chemical Engineering
Computer Engineering
Electronics Engineering
Medical Science Engg
Some possible disadvantages of high level modulation in TV transmitters are
| |
A. | 1 only [Wrong Answer] |
B. | 1 and 2 only [Wrong Answer] |
C. | 1, 2 and 3 [Correct Answer] |
D. | 2 and 3 only [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 :
⇒ Antenna commonly used for microwave links are
loop antennas
log periodic antennas
paraboloidal dishes
rhombic antennas
⇒ The resistance R_{AB} in the circui
10 Ω
12 Ω
9 Ω
3 Ω
⇒ The decorative lighting works on the principle of
periodic switching on and off
special inverter
rectifier
motor
⇒ A series resonant circuit has inductance L. If L is increased, the resonant frequency
increases
decreases
remains constant
may increases or decreases
⇒ A horizontal output stage is cutoff for retrace and 40% of trace. If time for each horizontal line is 64 μs and retrace time is 12 μs, the transistor is conducting for about
64 μs
6.4 μs
31 μs
3.1 μs
⇒ A h is the unit of quantity of electricity.
TRUE
FALSE
⇒ In figure, the switch is closed at t = 0 when current through inductor is 6 A, the rate of change of current through resistor is 6 A/s. The value of
1 H
2 H
3 H
4 H
⇒ A 3 phase bridge inverter is fed by 400 V battery. The load is star connected and has a resistance of 10 Ω per phase. The peak value of load current is
40 A
20 A
0.416666666666667
0.208333333333333
⇒ A receiver having poor IF selectivity will also have poor
sensitivity
double spotting
blocking
all of the above
⇒ In ac circuits maximum power is delivered to a load if load impedance is conjugate of source impedance.
TRUE
FALSE
⇒ In a Darlington pair
the emitter of first transistor drives the base of the second
the base of the first transistor drives the emitter of the second
emitters of the two transistors are connected through a resistor
none of the above
⇒ In the circuit shown in figure, maximum power will be transferred
Z_{L} = 13 - j 9
Z_{L} = 13 + j 9
Z_{L} = 9 - j 13
Z_{L} = 9 + j 13
⇒ A signum function is
zero for t greater than zero
zero for t less than zero
unity for t greater than zero
2∪(t) - 1
⇒ If f_{1} and f_{2} and half-power frequency and f_{0} be resonant frequency, the selectivity of R-L-C series circuit is given by
(f_{2} - f_{1})/2f_{0}
(f_{2} - f_{1})/f_{0}
(f_{2} - f_{0})/(f_{1} - f_{0})
(f_{2} - f_{1})/(f_{1} - f_{0})
⇒ Which of the following is invalid in Basic?
A ** B + - C
A ** B - C
A * B - C
A * B - C ** D
⇒
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true
⇒ When modulation index of an AM wave is increased from 0.5 to 1, the transmitted power
remains the same
increases by 25%
increases by 33.3%
increases by 50%
⇒ An ac tachometer has a drag cup construction so that
rotor inertia is low
rotor body is conducting
rotor is easy to fabricate
both (a) and (b)
⇒ Thevenin's impedance of an ac network is in general
resistance
R and L in series
R and C in series
Either R and L or R and C in series
⇒ In a step down chopper using pulse width modulation, T_{on} = 3 x 10^{-3} and T_{off} = 1 x 10^{-3} s. The chopping frequency is
333.33
250
500
1000
⇒ Which one is a linear system?
y[n] = x[n] x x[n - 1]
y[n] = x[n] + x[n - 10]
y[n] = x^{2}[n]
(a) and (c)
⇒ In a p-n-p transistor the main current carriers and the mechanism of flow respectively are
electrons, drift
holes, drift
holes, diffusion
electrons, diffusion
⇒ The output of basic DTL configuration is
low when one of the input is high
low when all inputs are high
high when all inputs are high
high when all inputs are low
⇒ The reason for glitches on the outputs of decoding gates on a synchronous counter is
FFs changing states together
FFs changing states one at a time
AND gates not functioning properly
none of the above
⇒ The binary sum of 111010_{2} and 11011_{2} is
1010101_{2}
1011001_{2}
1011101_{2}
1111111_{2}
⇒ For the truth table of the given figure
A + B + C
A + BC
A
B
⇒ In thermal ohm's law, temperature and power loss are analogous to
V and I respectively of ohm's law
I and V respectively of ohm's law
R and V respectively of ohm's law
I and R respectively of ohm's law
⇒ The on voltage and forward breakover voltage of an SCR depend on
gate current alone
band gap of semiconductor alone
gate current and semiconductor band gap respectively
semiconductor band gap and gate current respectively
⇒ In an ac network the sum of currents entering a node is 10 ∠45°. The sum of currents leaving the node is
19.32 ∠45°
15 ∠45°
20 ∠45°
zero
⇒ In a practical voltage source, the terminal voltage
cannot be less than source voltage
cannot be higher than source voltage
is always less than source voltage
is always equal to source voltage
⇒ Antenna commonly used for microwave links are
loop antennas
log periodic antennas
paraboloidal dishes
rhombic antennas
⇒ The resistance R_{AB} in the circui
10 Ω
12 Ω
9 Ω
3 Ω
⇒ The decorative lighting works on the principle of
periodic switching on and off
special inverter
rectifier
motor
⇒ A series resonant circuit has inductance L. If L is increased, the resonant frequency
increases
decreases
remains constant
may increases or decreases
⇒ A horizontal output stage is cutoff for retrace and 40% of trace. If time for each horizontal line is 64 μs and retrace time is 12 μs, the transistor is conducting for about
64 μs
6.4 μs
31 μs
3.1 μs
⇒ A h is the unit of quantity of electricity.
TRUE
FALSE
⇒ In figure, the switch is closed at t = 0 when current through inductor is 6 A, the rate of change of current through resistor is 6 A/s. The value of
1 H
2 H
3 H
4 H
⇒ A 3 phase bridge inverter is fed by 400 V battery. The load is star connected and has a resistance of 10 Ω per phase. The peak value of load current is
40 A
20 A
0.416666666666667
0.208333333333333
⇒ A receiver having poor IF selectivity will also have poor
sensitivity
double spotting
blocking
all of the above
⇒ In ac circuits maximum power is delivered to a load if load impedance is conjugate of source impedance.
TRUE
FALSE
⇒ In a Darlington pair
the emitter of first transistor drives the base of the second
the base of the first transistor drives the emitter of the second
emitters of the two transistors are connected through a resistor
none of the above
⇒ In the circuit shown in figure, maximum power will be transferred
Z_{L} = 13 - j 9
Z_{L} = 13 + j 9
Z_{L} = 9 - j 13
Z_{L} = 9 + j 13
⇒ A signum function is
zero for t greater than zero
zero for t less than zero
unity for t greater than zero
2∪(t) - 1
⇒ If f_{1} and f_{2} and half-power frequency and f_{0} be resonant frequency, the selectivity of R-L-C series circuit is given by
(f_{2} - f_{1})/2f_{0}
(f_{2} - f_{1})/f_{0}
(f_{2} - f_{0})/(f_{1} - f_{0})
(f_{2} - f_{1})/(f_{1} - f_{0})
⇒ Which of the following is invalid in Basic?
A ** B + - C
A ** B - C
A * B - C
A * B - C ** D
⇒
Assertion (A): Silicon is the most favoured semiconductor material.
Reason (R): PIV for silicon diode is more than that for germanium diode.
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true
⇒ When modulation index of an AM wave is increased from 0.5 to 1, the transmitted power
remains the same
increases by 25%
increases by 33.3%
increases by 50%
⇒ An ac tachometer has a drag cup construction so that
rotor inertia is low
rotor body is conducting
rotor is easy to fabricate
both (a) and (b)
⇒ Thevenin's impedance of an ac network is in general
resistance
R and L in series
R and C in series
Either R and L or R and C in series
⇒ In a step down chopper using pulse width modulation, T_{on} = 3 x 10^{-3} and T_{off} = 1 x 10^{-3} s. The chopping frequency is
333.33
250
500
1000
⇒ Which one is a linear system?
y[n] = x[n] x x[n - 1]
y[n] = x[n] + x[n - 10]
y[n] = x^{2}[n]
(a) and (c)
⇒ In a p-n-p transistor the main current carriers and the mechanism of flow respectively are
electrons, drift
holes, drift
holes, diffusion
electrons, diffusion
⇒ The output of basic DTL configuration is
low when one of the input is high
low when all inputs are high
high when all inputs are high
high when all inputs are low
⇒ The reason for glitches on the outputs of decoding gates on a synchronous counter is
FFs changing states together
FFs changing states one at a time
AND gates not functioning properly
none of the above
⇒ The binary sum of 111010_{2} and 11011_{2} is
1010101_{2}
1011001_{2}
1011101_{2}
1111111_{2}
⇒ For the truth table of the given figure
A + B + C
A + BC
A
B
⇒ In thermal ohm's law, temperature and power loss are analogous to
V and I respectively of ohm's law
I and V respectively of ohm's law
R and V respectively of ohm's law
I and R respectively of ohm's law
⇒ The on voltage and forward breakover voltage of an SCR depend on
gate current alone
band gap of semiconductor alone
gate current and semiconductor band gap respectively
semiconductor band gap and gate current respectively
⇒ In an ac network the sum of currents entering a node is 10 ∠45°. The sum of currents leaving the node is
19.32 ∠45°
15 ∠45°
20 ∠45°
zero
⇒ In a practical voltage source, the terminal voltage
cannot be less than source voltage
cannot be higher than source voltage
is always less than source voltage
is always equal to source voltage