302. Irrespective of the channel tuned in, secnd sound IF is
A. 4.5 MHz
B. 5.5 MHz
C. difference between picture IF and sound IF
D. none of these

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303. Gain of video amplifier in a TV receiver determines
A. the brightness of the picture
B. the contrast in the scene
C. the sharpness in the picture
D. none of these

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304. Higher the gain of video amplifier
A. higher the contrast is
B. higher the brightness is
C. lesser the contrast is
D. lesser the brightness

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305. Brightness control is located in
A. the audio section
B. the video section
C. the grid-cathode circuit of picture-tube
D. the horizontal scan section

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306.  In IF section of a typical television receiver
A. gain is of the order of 10,0000
B. gain for sound signals is less than that for picture-signals
C. gain for sound signals is greater than that for picture signal
D. none of these

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307. By adjusting Berightness control, we are actually
A. changing the grid-cathode bias of picture-tube
B. changing the gain of video amplifier
C. changing the picture-tube anode voltage
D. changing amplitude of video signal

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308. Fine tuning control in television receiver is
A. a preset inductance
B. a potentiometer
C. a variable condenser
D. none of these

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