PYQs Based test 19: Analog Electronics

Which one of the following statements is correct about an ac-coupled common-emitter amplifier operating in the mid-band region?

The transistor Q1 has a current gain β1 = 99 and the transistor Q2 has a current gain β2 = 49. The current IB2 in microampere is _______

A good current buffer has

The circuit shown in the figure is used to provide regulated voltage (5 V) across the 1 kΩ resistor. Assume that the Zener diode has a constant reverse breakdown voltage for a current range, starting from a minimum required Zener current, I${}_{Zmin}$ = 2 mA to its maximum allowable current. The input voltage V${}_I$ may vary by 5% from its nominal value of 6 V. The resistance of the diode in the breakdown region is negligible.



The value of R and the minimum required power dissipation rating of the diode, respectively, are

In the low pass filter shown in the figure for a cut-off frequency of 5 KHz, the value of R₂ (in kΩ) is