Question: A Hartley oscillator uses
[A].a tapped inductor
a tapped capacitor
both (a) and (b)
neither (a) nor (b)
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Electronics And Communication Engineering
In a three variable K map four adjacent cells give
Question: In a three variable K map four adjacent cells give
[A].single variable term
two variable term
three variable term
either (a) or (b)
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
A wave trap is a
Question: A wave trap is a
[A].series tuned circuit
a parallel tuned circuit
either a series tuned circuit or parallel tuned circuit
none of the above
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
It has R and L in one branch and a variable capacitance in second branch.
An RC coupled amplifier has an open loop gain of 200 and a lower cutoff frequency of 50 Hz. If negative feedback with β = 0.1 is used, the lower cut off frequency will be
Question: An RC coupled amplifier has an open loop gain of 200 and a lower cutoff frequency of 50 Hz. If negative feedback with β = 0.1 is used, the lower cut off frequency will be
[A].about 50 Hz
about 5 Hz
about 2.38 Hz
about 70.5 Hz
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
New lower cutoff frequency = .
In a four variable K map eight adjacent cells give
Question: In a four variable K map eight adjacent cells give
[A].single variable term
two variable term
three variable term
four variable term
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
A resistance R, inductance L and capacitance C are in series. The source frequency is adjusted to be equal to resonant frequency. The lower half power frequency is ω1. Another resistance R is added in series with the circuit. The new lower half power frequency will be
Question: A resistance R, inductance L and capacitance C are in series. The source frequency is adjusted to be equal to resonant frequency. The lower half power frequency is ω1. Another resistance R is added in series with the circuit. The new lower half power frequency will be
[A].ω1
less than ω1
more than ω1
either more than ω1 or less then ω1
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
As R increases, Q decreases, bandwidth = . Therefore, bandwidth increases. Hence lower half power frequency will be less than ωr.
A coil of resistance R and inductance L has a capacitor C in parallel with it. The source frequency is adjusted to a value equal to resonant frequency. Another capacitor C is added in parallel with the above circuit, the source current will
Question: A coil of resistance R and inductance L has a capacitor C in parallel with it. The source frequency is adjusted to a value equal to resonant frequency. Another capacitor C is added in parallel with the above circuit, the source current will
[A].increase
decrease
remain the same
may increase or decrease
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
The circuit will not in resonance. In parallel resonant circuit the current is minimum at resonance. Therefore, current will increase.
Maxterm designation for A + B + C is
Question: Maxterm designation for A + B + C is
[A].M0
M1
M3
M4
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
A + B + C = 000 = M0 .
A two branch parallel resonant circuit has a coil of resistance R and inductance L, in one branch and a capacitors C in the other branch. The source voltage is V, At resonance the circulating current is
Question: A two branch parallel resonant circuit has a coil of resistance R and inductance L, in one branch and a capacitors C in the other branch. The source voltage is V, At resonance the circulating current is
[A].
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
A rectifier circuit has load resistance R. It uses a capacitance filter having capacitance C. For low ripple in the output
Question: A rectifier circuit has load resistance R. It uses a capacitance filter having capacitance C. For low ripple in the output
[A].RC should be 1
RC should be low
RC should be high
RC should be neither low nor high
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.