A current controlled current source (CCCS) has an input impedance of  and output impedance of . When this CCCS is used in a negative feedback closed loop with a loop gain of 9, the closed loop output impedance is

In the feedback network shown below, if the feedback factor k is increased, then the

The nature of feedback in the op-amp circuit shown is

IC 555 in the adjacent figure is configured as an Astable multi-vibrator. It is enabled to oscillate at t=0 by applying a high input to pin 4. The pin description is: 1 and 8 − supply: 2-trigger; 4-reset; 6-threshold; 7-discharge. The waveform appearing across the capacitor starting from t=0, as observed on a storage CRO is

The typical frequency response of a two-stage direct coupled voltage amplifier is as shown in

The circuit of Figure shows a 555 Timer IC connected as an Astable multi-vibrator. The value of the capacitor C is 10nF. The values of the resistors  and  for a frequency of 10kHz and a duty cycle of 0.75 for the output voltage waveform are

The type of power amplifier which exhibits crossover distortion in its output is

A current amplifier has an input resistance of 10Ω, an output resistance of 10kΩ and a current gain of 1000. It is feed by a current source having a source resistance of 10k Ω and its output is connected to a 10 Ω load resistance.

The voltage series feedback in a feedback amplifier leads to

A practical R-C sinusoidal oscillator is built using a positive feedback amplifier with a closed loop-gain slightly less than unity. (True=1, False=0)

A Wien bridge oscillator is shown in figure. Which of the following statements are true, if f is the frequency of oscillation.