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In figure, the function of resistor | |
A. | to reduce ripples in the output [Wrong Answer] |
B. | to improve voltage regulation [Wrong Answer] |
C. | to limit the surge current [Correct Answer] |
D. | either (a) or (c) [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 :
⇒ A transmission line has Z_{0} = 300 Ω and Z_{L} = (300 - j300) ohm. The transmission coefficient is
1.265 ∠ - 18.43°
1.01 ∠ - 10°
1.14 ∠ 66.68°
1.09 ∠ 66.68°
⇒ Performance of a PIN diode switch is represented by
insertion loss when switch is off
insertion loss when switch is on
insertion loss when switch is on and isolation loss when switch is off
insertion loss when switch is off and isolation loss when switch is on
⇒ The sensitivity of a superheterodyne receiver is determined by
the gain IF amplifier
the gain of RF amplifier
the noise figure
all of the above
⇒ Which one of the following is an active component?
Diode (p-n)
Transistor as Amplifier
Transformer
Inductor
⇒ The input resistance of JFET ideally approaches
zero
1 ohm
100 ohm
infinity
⇒ The storage capacity of a CD is
360 k bytes per side
360 M bytes per side
540 k bytes per side
540 M bytes per side
⇒ Two coils X of 1000 turns and Y of 2000 turns are placed such that 60% of the flux produced by coil X links coil Y. A current of 1 A in coil X produces 0.1 wb flux. The mutual inductance between coils is
0.12 H
0.08 H
0.06 H
0.04 H
⇒ In N channel MOSFET with gate reverse biased, the gate current is of the order
10^{-3} amp
10^{-6} amp
10^{-9} amp
10^{-12} amp
⇒ The life time of a geosynchronous communication
5
10
20
50
⇒ A super heterodyne receiver has a IF of 465 kHz. It is tuned to a station broadcasting at 500 KHz and its oscillator is operating at 965 KHz, then the 1330 KHz frequency would be
adjacent channel frequency
image frequency
gyro frequency
maximum usable frequency
⇒ In which condition does BJT behave like a closed switch?
Cut off
Saturation
Forward active
Reverse active
⇒ A single phase half wave converter is feeding a resistive load. Output dc power is P_{dc} and total power delivered to load is P_{ac} then
P_{dc} = P_{ac} for all values of firing angles
P_{dc} = P_{ac} if firing angle is less than 180°
P_{dc} < P_{ac} for all values of firing angles
P_{dc} < P_{ac} if firing angle is less than 180°
⇒ Which of the following elements act as donor impurities?
1, 2, 3
1, 2, 4, 6
3, 4, 5, 6
1, 4, 5
⇒ Convolution of x(t + 5) with impulse function δ(t - 7) is equal to
x(t - 2)
x(t + 12)
x(t - 12)
(t + 2)
⇒ Two coupled coils have self inductance L_{1} and L_{2}. The coefficients of coupling is k. The mutual inductance is
k L_{1}L_{2}
k^{2}L_{1}L_{2}
kL_{1}L_{2}
kL_{1}L_{2}
⇒ A padder is basically a/an
insulator
variable resistor
capacitor
inductor
⇒
A-3, B-2, C-4, D-1
A-2, B-3, C-1, D-4
A-3, B-2, C-1, D-4
A-2, B-3, C-4, D-1
⇒ The first row of the window is called ' Title bar '.
TRUE
FALSE
⇒ In a turnstile antenna the crossed dipoles are excited with voltages
in phase with each other
90° out of phase with each other
120° out of phase with each other
180° out of phase with each other
⇒ Which of the following statement is correct for two wattmeters method of power measurement in 3 phase circuit?
Power can be measured by this method only for star connected loads
When two wattmeters have equal readings power factor is 0.5.
When power factor is 1, one of the wattmeters readings is zero
When the two wattmeter read equal and opposite, p.f. is zero.
⇒ A 100 + j 100 Ω load is to be matched to a line with Z_{0} = 300 Ω to give SWR = 1. The reactance of stub is
j 200 Ω
-j 200 Ω
j 100 Ω
-j 100 Ω
⇒ For VLF antennas radiation resistance is usually of the order of
less than one ohm
13 to 20 ohms
around 100 ohms
more than 200 ohms
⇒ The modulation index of an FM is changed from 0 to 1. How does the transmitted power change?
Gets halved
Gets doubled
Gets increased by 50 percent
Remains unchanged
⇒ A material has conductivity of 10^{-2} mho/m and a relative permittivity of 4. The frequency at which conduction current in the medium is equal to displacement current is
45 MHz
90 MHz
450 MHz
900 MHz
⇒ Robotic manipulator arms mostly use
hydraulic actuator
pneumatic actuator
electric motor actuator
none of the above
⇒ In 8085, F register has 8 bits.
TRUE
FALSE
⇒ The maximum temperature limit of class B insulation is
90°C
105°C
120°C
130°C
⇒ If the Q of a single-stage single-tuned amplifier is doubled, then its bandwidth will
remain same
become half
become doubled
become four times
⇒ Schrodinger wave equation is partial differential equation.
TRUE
FALSE
⇒ Read the following statements: Dual slope ADC provides
1 and 2
2 and 3
1, 2, 3
1, 2, 3, 4
⇒ A transmission line has Z_{0} = 300 Ω and Z_{L} = (300 - j300) ohm. The transmission coefficient is
1.265 ∠ - 18.43°
1.01 ∠ - 10°
1.14 ∠ 66.68°
1.09 ∠ 66.68°
⇒ Performance of a PIN diode switch is represented by
insertion loss when switch is off
insertion loss when switch is on
insertion loss when switch is on and isolation loss when switch is off
insertion loss when switch is off and isolation loss when switch is on
⇒ The sensitivity of a superheterodyne receiver is determined by
the gain IF amplifier
the gain of RF amplifier
the noise figure
all of the above
⇒ Which one of the following is an active component?
Diode (p-n)
Transistor as Amplifier
Transformer
Inductor
⇒ The input resistance of JFET ideally approaches
zero
1 ohm
100 ohm
infinity
⇒ The storage capacity of a CD is
360 k bytes per side
360 M bytes per side
540 k bytes per side
540 M bytes per side
⇒ Two coils X of 1000 turns and Y of 2000 turns are placed such that 60% of the flux produced by coil X links coil Y. A current of 1 A in coil X produces 0.1 wb flux. The mutual inductance between coils is
0.12 H
0.08 H
0.06 H
0.04 H
⇒ In N channel MOSFET with gate reverse biased, the gate current is of the order
10^{-3} amp
10^{-6} amp
10^{-9} amp
10^{-12} amp
⇒ The life time of a geosynchronous communication
5
10
20
50
⇒ A super heterodyne receiver has a IF of 465 kHz. It is tuned to a station broadcasting at 500 KHz and its oscillator is operating at 965 KHz, then the 1330 KHz frequency would be
adjacent channel frequency
image frequency
gyro frequency
maximum usable frequency
⇒ In which condition does BJT behave like a closed switch?
Cut off
Saturation
Forward active
Reverse active
⇒ A single phase half wave converter is feeding a resistive load. Output dc power is P_{dc} and total power delivered to load is P_{ac} then
P_{dc} = P_{ac} for all values of firing angles
P_{dc} = P_{ac} if firing angle is less than 180°
P_{dc} < P_{ac} for all values of firing angles
P_{dc} < P_{ac} if firing angle is less than 180°
⇒ Which of the following elements act as donor impurities?
- Gold
- Phosphorus
- Boron
- Antimony
- Arsenic
- Indium
1, 2, 3
1, 2, 4, 6
3, 4, 5, 6
1, 4, 5
⇒ Convolution of x(t + 5) with impulse function δ(t - 7) is equal to
x(t - 2)
x(t + 12)
x(t - 12)
(t + 2)
⇒ Two coupled coils have self inductance L_{1} and L_{2}. The coefficients of coupling is k. The mutual inductance is
k L_{1}L_{2}
k^{2}L_{1}L_{2}
kL_{1}L_{2}
kL_{1}L_{2}
⇒ A padder is basically a/an
insulator
variable resistor
capacitor
inductor
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | Ratio of maximum energy stored to energy dissipated per cycle | 1. | Propagation constant |
B. | TEM mode is loss less medium | 2. | Cutoff frequency is zero |
C. | Ratio of frequency in radian to phase velocity of EM wave | 3. | Quality factor of cavity |
D. | TEM is the mode of lowest cutoff frequency | 4. | Cylindrical waveguide |
A-3, B-2, C-4, D-1
A-2, B-3, C-1, D-4
A-3, B-2, C-1, D-4
A-2, B-3, C-4, D-1
⇒ The first row of the window is called ' Title bar '.
TRUE
FALSE
⇒ In a turnstile antenna the crossed dipoles are excited with voltages
in phase with each other
90° out of phase with each other
120° out of phase with each other
180° out of phase with each other
⇒ Which of the following statement is correct for two wattmeters method of power measurement in 3 phase circuit?
Power can be measured by this method only for star connected loads
When two wattmeters have equal readings power factor is 0.5.
When power factor is 1, one of the wattmeters readings is zero
When the two wattmeter read equal and opposite, p.f. is zero.
⇒ A 100 + j 100 Ω load is to be matched to a line with Z_{0} = 300 Ω to give SWR = 1. The reactance of stub is
j 200 Ω
-j 200 Ω
j 100 Ω
-j 100 Ω
⇒ For VLF antennas radiation resistance is usually of the order of
less than one ohm
13 to 20 ohms
around 100 ohms
more than 200 ohms
⇒ The modulation index of an FM is changed from 0 to 1. How does the transmitted power change?
Gets halved
Gets doubled
Gets increased by 50 percent
Remains unchanged
⇒ A material has conductivity of 10^{-2} mho/m and a relative permittivity of 4. The frequency at which conduction current in the medium is equal to displacement current is
45 MHz
90 MHz
450 MHz
900 MHz
⇒ Robotic manipulator arms mostly use
hydraulic actuator
pneumatic actuator
electric motor actuator
none of the above
⇒ In 8085, F register has 8 bits.
TRUE
FALSE
⇒ The maximum temperature limit of class B insulation is
90°C
105°C
120°C
130°C
⇒ If the Q of a single-stage single-tuned amplifier is doubled, then its bandwidth will
remain same
become half
become doubled
become four times
⇒ Schrodinger wave equation is partial differential equation.
TRUE
FALSE
⇒ Read the following statements: Dual slope ADC provides
- higher speed as compared to other ADC
- very good accuracy
- good rejection of power supply
- better resolutions compared to other ADC for the same number of bits
1 and 2
2 and 3
1, 2, 3
1, 2, 3, 4