1) What is the effect on the transmitted power of AM signal when the modulation index changes from 0.8 to 1?a. 0.1364b. 0.3856c. 1.088d. 0,52) Calculate the power in a DSB SC signal when the modulation is 60% with a carrier power of 600W.a. 600 Wb. 540 Wc. 108 Wd. 300 W3) Calculate the modulation index when the un modulated carrier power is 15KW, and after modulation, carrier poweris 17KW.a. 68%b. 51.63%c. 82.58%d. 34.66%4) What is the change in the value of transmitted power when the modulation index changes from 0 to 1?a. 100%b. Remains unchangedc. 50%d. 80%5) The antenna current of the transmitter is 10A. Find the percentage of modulation when the antenna current increasesto 10.4A.а. 32%b. 28.5%с. 64%d. 40%6) Calculate the power saved in an Amplitude Modulated wave when it is transmitted with 45% modulation:- - Withoutcarrier- Without carrier and a sidebandc. 82%, 18%a. 90%, 95%b. 82%, 91%d. 68%, 16%7) An AM signal has a total power of 48 Watts with 45% modulation. Calculate the power in the carrier and thesidebands.a. 39.59 W, 4.505 W b. 40.59 W. 4.205 W c, 43.59 W, 2.205 W d. 31.59 W, 8.205 W8) If an AM signal is represented byv = ( 15 +3 Sin( 211 * 5 * 10 t) ) * Sin( 211 * 0.5 * 10° t) voltsi) Calculate the values of the frequencies of carrier and modulating signals.ii) Calculate the value of modulation index.iii) Calculate the value of bandwidth of this signal.a. 1.6 MHz and 8 KHz, 0.6, 16 MHzc. 2.4 MHz and 18 KHz, 0.2, 16 KHzb. 1.9 MHz and 18 KHz, 0.2, 16 KHzd. 1.6 MHz and 8 KHz, 0.2, 16 KHz9) Calculate the total modulation Index when a carrier wave is being modulated by two modulating signals withmodulation indices 0.8 and 0.3.a. 0.8544b. 0.6788c. 0.9999d. 0.554510) Calculate the power in one of the side band in SSBSC modulation when the carrier power is 124W and there is 80%modulation depth in the amplitude modulated signal.a. 89,33 Wb. 64.85 Wc. 79.36 Wd. 102 W11) An AM broadcast station transmits modulating frequencies up to 6 kHz. If the AM station is transmitting on afrequency of 894 kHz, the values for maximum and minimum upper and lower sidebands and the total bandwidthoccupied by the AM station are:a. 900 KHz, 888 KHz, 12 KHzb. 894 KHz, 884 KHz, 12 KHzc. 894 KHz, 888 KHz, 6 KHzd. 900 KHz, 888 KHz, 6 KHz12) An un modulated AM signal produces a current of 5.4 A. If the modulation is 100 percent, calculate:- the carrierpower, the total power,and the sideband power when it is transmitted through an antenna having an impedance of 502.a. 1458 W, 2187.5 W, 729.25 Wc. 1438 W, 2187.5 W, 759.25 Wb. 278 W, 2187.5 w, 1917.25 Wd. 280 W, 2187.5 W, 750.25 W6 kHz. If the AM station is transmitting on a13) An AM broadcast station transmits modulating frequencies upfrequency of 894 kHz, the values for maximum and minimum upper and lower sidebands and the total bandwidthoccupied by the AM station are:a. 900 KHz, 888 KHz, 12 KHzc. 894 KHz, 888 KHz, 6 KHzb. 894 KHz, 884 KHz, 12 KHzd. 900 KHz, 888 KHz, 6 KHz14) The input circuit of a high-gain RF amplifier has an equivalent resistance value of 10000. The amplifierhas an overall voltage gain of 1000 and a bout width of200KHz. Estimate the maximum noise voltageamplitude at the input to the Amplifier due to thermal noise only when the operating temperature is 29 °C.а. 1.826х 10-€c. 1.38x106b. 3.35х10%d. 6.38x106

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