Transistor Tuned Amplifiers

31. In the above question, what are the values of cut-off frequencies?

1. 140 kHz , 60 kHz
2. 1020 kHz , 980 kHz
3. 1030 kHz , 970 kHz
4. None of the above

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32. In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve __________

1. Remains the same
2. Is lowered
3. Is raised
4. None of the above

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33. The dimensions of L/CR are that of __________

1. Farad
2. Henry
3. Ohm
4. None of the above

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34. The Q of a tuned amplifier is 50. If the resonant frequency for the amplifier is 1000kHZ, then bandwidth is __________

1. 10kHz
2. 40 kHz
3. 30 kHz
4. 20 kHz

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35. The Q of a tuned amplifier is generally __________

1. Less than 5
2. Less than 10
3. More than 10
4. None of the above

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36. The Q of a tuned circuit refers to the property of __________

1. Sensitivity
2. Fidelity
3. Selectivity
4. None of the above

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37. The Q of an LC circuit is given by __________

1. 2pfr x R
2. R / 2pfrL
3. 2pfrL / R
4. R2/2pfrL

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38. The voltage gain of a tuned amplifier is __________ at resonant frequency

1. Minimum
2. Maximum
3. Half-way between maximum and minimum
4. Zero

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39. Tuned class C amplifiers are used for RF signals of __________

1. Low power
2. High power
3. Very high power
4. None of the above

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40. When either L or C is increased, the resonant frequency of LC circuit __________

1. Remains the same
2. Increases
3. Decreases
4. Insufficient data

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