Question 1

In a FM receiver, amplitude limiter
A)amplifiers low frequency signals
B)reduces the amplitude of signals
C)eliminates any change in amplitude of received fm signals
D)none of the above

Accepted Answer

An amplitude limiter in an FM receiver eliminates any change in amplitude of received FM signals, ensuring that the receiver's output depends only on the frequency variations of the received signal, not its amplitude. This helps in reducing the noise and improving the quality of the received signal.

Question 2

A buffer amplifier is
A)a double-tuned amplifier
B)a high gain d.c. amplifier
C)a cathode follower stage
D)none of the above

Accepted Answer

The answer of A buffer amplifier is
A)a double-tuned amplifier
B)a high...

Question 3

Leak type bias is used in plate modulated class C amplifier to
A)increase the bandwidth
B)prevent over modulation
C)prevent excessive grid current
D)prevent tuned circuit damping

Accepted Answer

Leak type bias is used in plate modulated class C amplifiers to prevent excessive grid current by providing a biasing method that allows the grid to self-bias, thus avoiding damage to the tube from high grid currents.

Question 4

The direction of rotation of a CD is
A)clockwise
B)anticlockwise
C)clockwise or anticlockwise depending on frequency of data stored
D)mostly anticlockwise but some times clockwise

Accepted Answer

The answer of The direction of rotation of a CD...

Question 5

One of the advantages of base modulation over collector modulation of a transistor class C amplifier is
A)improved efficiency
B)better linearity
C)high power output per transistor
D)the lower modulating power requirement

Accepted Answer

Base modulation in a transistor class C amplifier requires less modulating power compared to collector modulation. This is because in base modulation, the modulating signal is applied at the base, which operates at a lower power level than the collector.

Quiz 3: Radio Transmission and Modulation Techniques

In a FM receiver, amplitude limiter

A buffer amplifier is

Leak type bias is used in plate modulated class C amplifier to

The direction of rotation of a CD is

One of the advantages of base modulation over collector modulation of a transistor class C amplifier is