Related Questions

Which antenna is a wideband antenna?
A Hertz antenna
B Marconi antenna
C Folded dipole
D None of the above
A Yagi antenna has a driven antenna
A Only
B With a reflector
C With one or more directors
D With a reflector and one or more directors
The radiation pattern of loop antenna is
A Circle
B Semicircle
C Elliptical
D Cardoid or Limacon
What are the three important manipulations done in a for loop on a loop variable?
A Updation, Incrementation, Initialization
B Initialization,Testing, Updation
C Testing, Updation, Testing
D Initialization,Testing, Incrementation
A closed loop system is distinguished from open loop system by which of the following ?
A Servomechanism
B Feedback
C Output pattern
D Input pattern
Compared to an open-loop system, a closed-loop control system is:
A more accurate
B more complex
C more stable
D All of the above
E None of the above
In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is
A $$\frac{{\text{G}}}{{1 + {\text{H}}}}$$
B $$\frac{{\text{H}}}{{1 + {\text{G}}}}$$
C $$\frac{{\text{G}}}{{\text{H}}}$$
D $$\frac{{\text{H}}}{{\text{G}}}$$
A helical antenna is used for satellite tracking because of
A Circular polarization
B Maneuverability
C Beamwidth
D Gain
The input used by an antenna or cable to a TV set uses frequencies called:
A IF
B RF
C AF
D SAP
Parabolic and lens antenna used at
A Microwave frequency
B Medium frequency
C Low frequency
D High frequency

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