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In the circuit shown, the steady state is reached with S open S is closed at t = 0, the current I in the 1 Ω resistor connected is to be determined at t = 0^{+} is give | |
A. | 1 [Correct Answer] |
B. | 2 [Wrong Answer] |
C. | 3 [Wrong Answer] |
D. | 42828 [Wrong Answer] |
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Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
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⇒ A signal x(n) = sin(ω_{0}n + φ) is the input to a linear time invariant system having a frequency response H(e^{jω}) If the O/P of the system is Ax(n -n_{0}), then the general form of H(e^{jω}) will be
- n_{0}ω_{0} + β for any arbitrary real β
- n_{0}ω_{0} + 2pk for any arbitrary integer k
n_{0}ω_{0} + 2pk for any arbitrary integer k
- n_{0}ω_{0} + φ
⇒
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Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
⇒ Consider the following assert
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SI and S2 are both true but S2 is not a reason for SI
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⇒ In a TWT the amplitude of resultant wave travelling down the helix remains constant
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⇒ A thermometer requires 1 minute to indicate 98% of its final response to a step input. If it is a first order system the time constant is
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⇒ In an end fire array, the radiation pattern
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⇒ Which of the following is true in a tape recorder?
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⇒ The opposition of an inductor to current flow
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⇒ A signal x(n) = sin(ω_{0}n + φ) is the input to a linear time invariant system having a frequency response H(e^{jω}) If the O/P of the system is Ax(n -n_{0}), then the general form of H(e^{jω}) will be
- n_{0}ω_{0} + β for any arbitrary real β
- n_{0}ω_{0} + 2pk for any arbitrary integer k
n_{0}ω_{0} + 2pk for any arbitrary integer k
- n_{0}ω_{0} + φ
⇒
Assertion (A): Silicon is preferred over germanium in manufacture of semiconductor devices.
Reason (R): Forbidden gap in silicon is more than that in germanium.
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
⇒ Consider the following assert
Only S2 is true
SI and S2 are both true but S2 is not a reason for SI
SI and S2 are both true and S2 is a reason for SI
Both SI and S2 are false
⇒ Thermal noise is independent of
temperature
bandwidth
centre frequency
Boltzmann constant
⇒ Two ammeters having resistances of 0.5 Ω and 0.25 Ω and having full scale reading of 25 A each are connected in parallel. To ensure that neither of them goes beyond scale, the total current should not be more than
50 A
37.5 A
25 A
40 A
⇒ The write cycle time of memory is 200 nsec. The maximum rate of data which can be stored is
200 words/sec
5 x 10^{3} words/sec
5 x 10^{6} word/sec
5 x 10^{9} words/sec
⇒ Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after ADI A4H?
4 AH, 0
4 AH, 1
4 BH, 0
4 BH, 1
⇒ A receiver has poor selectivity. It will also have poor
sensitivity
double spotting
blocking
diversity reception
⇒ The scale of a dynamometer is linear when used as
ammeter
voltmeter
wattmeter
both (a) and (c)
⇒ In a backward wave oscillator the efficiency
is much higher than in TWT
is much lower than in TWT
is almost the same as in TWT
either (a) or (b)
⇒ A + A . B =
B
A . B
A
A or B
⇒ In a TWT the amplitude of resultant wave travelling down the helix remains constant
TRUE
FALSE
⇒ The modulating frequency in frequency modulation is increased from 10 kHz to 30 kHz. The bandwidth is increased by
6
1/6 times
increase by 30 kHz
increase by 20 kHz
⇒ A thermometer requires 1 minute to indicate 98% of its final response to a step input. If it is a first order system the time constant is
1 minute
0.5 minute
0.25 minute
0.1 minute
⇒ At t = 0^{+}, the current i_{1- V/2R- V/4R- V/Rzero}
⇒ A p matching network for coupling the transmitter output of the antenna is shown in figu
minimum D.C. plate current
maximum D.C. plate current
maximum RF antenna current
specified value of the D.C. plate current
⇒ Which one of the following is the correct statement of the system characterized by the equation y(t) = ax(t) + b?
linear for any value of b
linear if b > 0
linear if b < 0
non-linear
⇒ In figure the approximate voltage
base and emitter are - 8 V and - 7.3 V
base and collector are - 8 V and - 5 V
collector and emitter are - 5 V and - 7.3 V
base, emitter and collector are - 8, - 7.3 and - 5 V
⇒
Match the following:
List I (Microwave device) | List II (Application) | ||
---|---|---|---|
A. | PIN diode | 1. | Microwave amplification |
B. | GaAs MOSFET | 2. | Low noise microwave generation |
C. | Transferred electron device | 3. | Electronic tuning of MW oscillator |
D. | Varactor diode | 4. | Light wave detection |
A-1, B-2, C-4, D-3
A-4, B-1, C-2, D-3
A-2, B-3, C-1, D-4
A-3, B-4, C-2, D-1
⇒ Which of the following factor does NOT contribute to the drift of a geostationary satellite from its stationary position in space?
Pressure of solar radiations
Gravitational changes due to Sun and Moon
Oblateness of the Earth
Weight of the satellite
⇒ A system is said to be marginal stable if
poles lies on Real axis
zero lies on Real axis
poles lies on Imaginary axis
zeros lies on origin
⇒ Surface leakage current is a part of
reverse current
forward current
reverse breakdown
forward breakdown
⇒ F_{2} layer of atmosphere extends from
250 km to 400 km
150 km to 250 km
50 km to 150 km
15 km to 50 km
⇒ Which one of the following is correct?
Coding reduces the noise in the signal
Coding deliberately introduces redundancy into messages
Coding increases the information rate
Coding increases the channel bandwidth
⇒ In an end fire array, the radiation pattern
is in the plane of array
is at right angles to array
is at an angle to the plane of array
either (b) or (c)
⇒ The expression A ** B / C + D is equivalent to
AB / C + D
AB / C + D
AB / (C + D)
None of the above
⇒ The affect of ground on radiation pattern is to
cause cancellation of radiation along the ground
produce more number of nulls
both (a) and (b)
either (a) or (b)
⇒ Which of the following is true in a tape recorder?
Vow is due to variation in motor speed but flutter is due to some other reason
Both vow and flutter are due to variations in motor speed
Flutter is due to variation in motor speed but vow is due to some other reason
Neither vow nor flutter is due to variation in motor speed
⇒ The opposition of an inductor to current flow
depends only on the resistance of the coil
depends on the magnitude of the applied voltage
varies directly with frequency
varies inversely with frequency
⇒ Out of the three transforms viz. Z-transform, Laplace transform and Fourier transform
all three are used in continuous time domain
all three are used in both continuous time domain and discrete time domain
Z transform is used in continuous time domain while Laplace and Fourier transforms are used in discrete time domain
Z transform is used is discrete time domain while Laplace and Fourier transforms are used in continuous time domain