MCQ in Modulation Part 19 – Answers

Below are the answers key for the Multiple Choice Questions in Modulation Part 19.

901. Differential amplifier

902. Crystals

903. Both a and b

904. 2 kHz

905. 2997 and 3003 kHz

906. Phase shift

907. Product detector

908. Mixer

909. Fo + fm

910. Linear summing

911. FET

912. Resonant circuit

913. Amplitude

914. Phase

915. Decreases

916. Frequency

917. Zero crossing points

918. 12.5

919. 5

920. Twice

921. ½

922. PWM

923. Lower Complexity and Cost

924. Excessive use of spectrum space

925. Capture effect

926. 4E

927. Linear devices

928. 66.66

929. Prevent excessive grid current

930. Grid-modulated class C amplifier

931. Increased by 50 percent

932. The lower modulating power required

933. 0.5

934. The discriminator frequency must not be too low, or the system will fail

935. The amplitude of any sideband depends on the modulation index

936.  Lies in the different definitions of the modulation index

937. Equalization is unnecessary

938. 3 mf

939. δ

940. Amplifying the higher audio frequencies

941. Decreased

942. Frequency modulation

943. Lower bandwidth is required

944. Armstrong modulator

945. Transmitter circuits must be more stable, giving better reception

946. A3H

947. There are more balanced modulators; therefore the carrier is suppressed better

948. Mechanical

949. A3H

950. Simplify the frequency stability problem in reception

Questions and Answers in Modulation Series

Following is the list of multiple choice questions in this brand new series:

Complete List of MCQ in Communications Engineering per topic