Related Questions

Most of the amplification in a superhetrodyne receiver occurs at ___________ stage
A IF
B RF amplifier
C Audio amplifier
D Detector
In superhetrodyne receiver, the input at mixer stage is ___________
A IF and RF
B RF and AF
C IF and AF
D RF and local oscillator signal
In a superhetrodyne receiver, the difference frequency is chosen as the IF rather than the sum frequency because ___________
A The difference frequency is closer to oscillator frequency
B Lower frequencies are easier to amplify
C Only the difference frequency can be modulated
D None of the above
If a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling
A Loose
B Tight
C Critical
D None of the above
For a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will
A Increase
B Decrease
C Remain unaffected
D Other factors control it
A receiver has poor IF selectivity. It will therefore also have poor
A Blocking
B Double-spotting
C Diversion reception
D Sensitivity
In which of the following unit operations, the selectivity is an important parameter?
A Distillation
B Solvent extraction
C Absorption
D None of these
In Orsat's apparatus, ammoniacal cuprous chloride is used for selectivity absorbing
A CO
B CO2
C O2
D H2O
Selectivity of the solvent used in solvent extraction should be
A 1
B > 1
C 0
In liquid extraction, if the selectivity is unity, then
A Separation of the constituents is the most effective
B No separation will occur
C Amount of solvent required will be minimum
D Solvent flow rate should be very low

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