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1) A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation ? a. 50 kW b. 5 kW c. 8 kW d. 25 kW
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2) As the modulation level is increased, the carrier power__________________? a. Is increased b. Remains the same c. Is decreased d. None of the above
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3) A high Q tuned circuit will permit an amplifier to have high __________________? a. Fidelity b. Frequency range c. Sensitivity d. Selectivity
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4) Man made noise are______________ variations? a. Amplitude b. Frequency c. Phase d. Both phase and frequency
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5) If level of modulation is increased ______________ power is increased? a. Carrier b. Sideband c. Carrier as well as sideband d. None of the above
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6) Demodulation is done in ________________? a. Receiving antenna b. Transmitter c. Radio receiver d. Transmitting antenna
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7) In radio transmission, the medium of transmission is ________________? a. Space b. An antenna c. Cable d. None of the above
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8) In TV transmission, picture signal is ______________ modulated? a. Frequency b. Phase c. Amplitude d. None of the above
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9) In a radio receiver, noise is generally developed at _______________? a. IF stage b. Receiving antenna c. Audio stage d. RF stage
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10) The signal voltage induced in the aerial of a radio receiver is of the order of ________________? a. mV b. µV c. V d. None of the above
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