Amplitude modulation

For low values of L, frequency must be

• High

• Low

• Moderate

Choose the incorrect answer. The benefits of wireless communication include

• Low loss

• Mobility

• Accessibility

• Scalability

Choose the incorrect statement. Amplitude modulation is a process of

• Varying the amplitude of the carrier according to the frequency of the message.

• Changing the amplitude of the carrier signal in accordance with the amplitude of the message signal

• Changing the amplitude of the carrier wave in proportion to the amplitude of the modulation signal

• Varying the amplitude of the carrier according the amplitude of the message

Ptotal/Pc is

• 1+m/2

• m/2

• 1-m/2

• (1+m)/2

Choose the correct power saving, if carrier alone is suppressed

• 66.66%

• 75%

• 33.33%

• 83.33%

Choose the type of amplifiers used in low level modulation

• Linear amplifiers

• Class C amplifiers

• AF amplifiers

• Low level amplifiers

Choose the bandwidth occupied by the TV picture signal

• 6.75 MHz

• 11 MHz

• 5.55 MHz

• 10 MHz