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ECE Objective Questions { Analog Communication System }



127. The percentage of modulation for 45 kHz deviation in the FM broadcast band will be
A.30%
B. 40 W
C.60%
D.90%

128. A FM wave is represented by e = 12 sin (6 x 108t + 5.5 sin 1250 t) The carrier frequency is
A. 66 MHz
B. 95.5 Wiz
C. 125 MHz
D. 166 MHz

129. The modulating frequency above is
A. 199 Hz
B. 1990 MHz
C. 199 KHz
D. 199 MHz

130. A FM signal has modulating frequency fm and maximum frequency deviation of 8. The bandwidth will be nearly
A.8
B.28
C.2fm8
D. fm8

131. Which of the following is likely to be the bandwidth ofa FM receiver?
A. 5 kHz
B. 20 kHz
C. 200 kHZ
D. 20 MHz

132. In case of wide band FM signal the modulation index may be expected to be
A.0.5
B.1
C. less than 1
D. more than 1

133. The frequency of a FM wave is given by f = fc (1 + KEm cos wt) In this the maximum deviation is given bY
A. K
B.K.Em
C.K.Em.fc
D.K.Em.fc.wm.

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