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The maximum and minimum voltage of an amplitude modulated signal are and respectively. The percentage modulation index will be
(a)
(b)
(c)
(d)

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Important Questions on Electronic Devices Semiconductors
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The typical transfer characteristic of a transistor in CE configuration is shown in figure. A load resistor of is connected in the collector branch of the circuit used. The input resistance of the transistor is . The voltage gain of the transistor is

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The logic gate circuit is

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In the case of amplitude modulation to avoid distortion the modulation index should be :

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An n.p.n transistor with current gain in common emitter configuration is shown in figure. The output voltage of the amplifier will be
