Question: A transistor behaves as a linear device for _____________?

• 1. Small signals only
• 2. Large signals only
• 3. Both small and large signals
• 4. None of the above

Question: The h parameter approach gives correct results for_______________?

• 1. Large signals only
• 2. Small signals only
• 3. Both small and large signals
• 4. None of the above

Question: Hybrid means_____________?

• 1. Mixed
• 2. Single
• 3. Unique
• 4. None of the above

Question: In CE arrangement, the value of input impedance is approximately equal to ______________?

• 1. Hie
• 2. Hoe
• 3. Hre
• 4. None of the above

Question: The letters AVC stand for ________________?

• 1. Audio voltage control
• 2. Abrupt voltage control
• 3. Automatic volume control
• 4. Automatic voltage control

Question: In superhetrodyne receiver, the input at mixer stage is________________?

• 1. IF and RF
• 2. RF and AF
• 3. IF and AF
• 4. RF and local oscillator signal

Question: When the modulating signal controls the frequency of the carrier, we get______________?

• 1. Phase modulation
• 2. Amplitude modulation
• 3. Frequency modulation
• 4. May be any one of the above

Question: The IF is 455 kHz. If the radio receiver is tuned to 855 kHz, the local oscillator frequency is _______________?

• 1. 455 kHz
• 2. 1310 kHz
• 3. 1500 kHz
• 4. 1520 kHz

Question: The function of ferrite antenna is to_________________?

• 1. Reduce stray capacitance
• 2. Stabilise d.c. bias
• 3. Increase the Q of tuned circuit
• 4. Reduce noise

Question: A 100 V carrier is made to vary between 160 V and 40 V by the signal. What is the modulation factor ?

• 1. 3
• 2. 6
• 3. 5
• 4. None of the above