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In the circuit of figure, the switch is closed at t = 0. At t = 0^{+} the current through | |
A. | 0.166666666666667 [Correct Answer] |
B. | 2.5 A [Wrong Answer] |
C. | 3.1 A [Wrong Answer] |
D. | 0 [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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increases with increases in temperature
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6 k
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---|---|---|---|
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Aristotle
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⇒ The emitter follower steps up the impedance by a factor of
a
β
a β
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⇒ As compared to a BJT amplifier circuit, a JFET amplifier circuit
has low input impedance
has high input impedance
has very low input impedance
may have either low or high input impedance
⇒ The PSD and the power of a signal g(t) are respectively S_{g}(ω) and P_{g}, the PSD and the power of signal a.g(t) are respectively
aS^{2}_{g} (ω) and a^{2}P_{g}
aS_{g}^{2} (ω) and aP_{g}
aS_{g} (ω) and a^{2}P_{g}
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(15 + j 30) Ω
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50 V
82.8 V
100 V
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⇒ If Laplace transform of f(t) is F(s), then £ f(t - a) u (t - a)= 0
e^{as} F(s)
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- e^{as} F(s)
- e ^{-as} F(s)
⇒ For the logic circuit of the given figure the simplified Boolean equa
Y = (A + B) (C + D) (E + F)
Y = A = B + C + D + E + F
ABCDEF
ABC + DEF
⇒ The slew rate of an ideal op-amp is
very slow
slow
fast
infinitely fast
⇒ A (0.75 - j50) ohm load is connected to a coaxial transmission line of Z_{0} = 75 ohms at a frequency of 10 GHz Which of the following will be the best method of matching?
Connecting an inductance at the end
Connecting a short circuited stub at the load
Connecting a capacitance at some distance from the load
Connecting a short circuited stub at some specified distance from the load
⇒ An RC series circuit is charged by a voltage E. After a long time the battery is removed and a short circuit is placed across R-C. Then
the polarity of voltage across R is same during discharge and during charge
the polarity of voltage across R during discharging is opposite to that during charging
the polarity of voltage across R depends on time constant RC
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Reason (R): The method of superposition is applicable only to linear systems.
Both A and R are true and R is correct explanation of A
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⇒ When a reverse bias is applied to a p-n junction, the width of depletion layer.
decreases
increases
remains the same
may increase or decrease
⇒ Fourier transform F(jω) of an arbitrary signal has the property
F(jω) = F(- jω)
F(jω) = - F(- jω)
F(jω) = F*(- jω)
F(jω) = - F*(jω)
⇒ Current having waveform in figure flows through 10 Ω resistance. Average powe
1000 W
500 W
333.3 W
250 W
⇒ An OR gate has 4 inputs. One input is high and the other three are low. The output
is low
is high
is alternately high and low
may be high or low depending on relative magnitude of inputs
⇒
Assertion (A): A demultiplexer cannot be used as a decoder
Reason (R): A multiplexer selects one of many outputs whereas a decoder selects on output corresponding to coded input.
Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true
⇒ For TM waves in a parallel plate waveguide, the minimum attenuation arising from imperfect conductors would occur at a freq. of (f_{c} is the cut off frequency)
3 f_{c}
3 f_{c}
2 f_{c}
2 f_{c}
⇒ Three resistance of 15 Ω each are connected in delta. The resistance of equivalent star will have a value of
15 Ω
5 Ω
5/3 Ω
45 Ω
⇒ For an npn transistor connected as shown in the figure V_{BE} = 0.7 volts. Given that reverse saturation current of the junction at room temperature 300K is 10^{-13}A, the emitter curr
30 mA
39 mA
49 mA
20 mA
⇒ In a shield helix
the spacing between adjacent turns is very large
the spacing between adjacent turns approaches zero
the spacing between adjacent turns approaches zero and wire thickness approaches zero
the spacing between adjacent turns is very large wire thickness approaches zero
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ALU 1C 74181
can carry out is4
8
16
32
⇒ To obtain very high input and O/P impedance in a feedback amplifier, the type of feedback utilized
voltage series
current series
voltage shunt
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⇒
Match the following:
List I (Bits operator in C) | List II (Meaning) | ||
---|---|---|---|
A. | ˜ | 1. | Bitwise XOR |
B. | & | 2. | Bitwise AND |
C. | | | 3. | Bitwise OR |
D. | U | 4. | One's complement |
A-1, B-2, C-3, D-4
A-4, B-3, C-2, D-1
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⇒ Consider the following statements about a magic tee
- The collinear arms are isolated from each other.
- On of the collinear arms is isolated from E arm.
- On of the collinear arms is isolated from H arm.
- E and H arms are isolated from each other.
1 and 2 are correct
1 and 3 are correct
1 and 4 are correct
2 and 3 are correct