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1 The ripple factor in case of a full-wave rectifier is :
2
Consider the following statements :
1. A differential amplifier is used at the input stage of an operational amplifier
2. Differential amplifiers have very high MRR
Which of these statements are correct?
3
The maximum efficiency of a half- wave rectifier is :
4
If a differential amplifier has a gain of 20,000 and CMRR = 80 dB, its common mode gain is
5
One of the reasons why vacuum tubes eventually fail at microwave frequencies is that their
6
The seek time of a disk is 30 msec. It rotates at the rate of 30 rotations per second. Each track has a capacity of 300 words. The access time is :
7
A parametric amplifier is to be cooled :
8
A waveguide section in microwave circuits will act as a :
9
The waveguide modes are usually excited from a signal source through :
10
The minimum cut-off frequencies for a rectangular waveguide are obtained when:
11
For any lossless, reciprocal three port network, one port can be terminated in a reactance so that the other two ports are :
12
A micro – strip line consists of a single ground plane and a thin strip conductor on a :
13
Parabolic reflectors use Cassegrain feed to:
14
A Ruby Maser is preferred to Ammonia Maser for microwave amplification because it has
15
Laser is based on the principle of :
16
Magnetron is a :
17
Optical fibers are preferred as communication links for Lasers because they