Q. The heat sink disposes off heat mainly by

View solution

Q. A major advantage of TWT over a Klystron lies in its

View solution

Q. Pick the odd-one out

View solution

Q. In a CE amplifier the output coupling capacitor is short circuited. The dc collector voltage

View solution

Q. A certain transistor has αdc of 0.98 and a collectors leakage current of 5 μA. If IE = 1 mA, the collector current will be

View solution

Q. If 1.5% of the output of an amplifier is feedback positively to the input, the minimum gain required of the amplifier for oscillations to occur, is

View solution

Q. The use of a capacitor filter in a rectifier circuit gives satisfactory performance only when the load

View solution

Q. Two 3Ω speakers in series will have a total impedance of

View solution

Q. In a CE amplifier the ac signal is increased. Which of the following will not change?

View solution

Q. The ideal op-amp has the following characteristics

View solution

Q. The input differential stage of op-amp. 741 is baised at about 10 μA current such a low current of the input stage gives

1. high CMRR
2. high differential gain
3. low differential
4. high input impedance

Which of these are correct?

View solution

Q. IN 3242 is a

View solution

Q. Low frequency response of amplifier is mainly limited by

View solution

Q. With negative feedback the closed loop gain is always less than open loop gain.

View solution

Q. As compared to a bipolar transistor, a JFET is

View solution

Q. In a bistable multivibrator, commutating capacitors are used to

View solution

Q. Which of the following values represents the open loop gain of typical op-amp?

View solution

Q. Which of the following configuration has low thermal stability?

View solution

Q. Efficiency of class A power amplifier is very poor.

View solution

Q. An ideal op-amp can amplify dc signals

View solution