1) Referring to the schematic of symmetrical π attenuator below, what will be the computational value of attenuation in neper, if D = 20 dB & R0 = 400 ohm?
a. 10
b. 20
c. 40
d. 80
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Answer
Explanation
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ANSWER: 10
Explanation:
No explanation is available for this question!
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2) If the value of (P1 / P2) in power ratio expressed in terms of dB is greater than unity, what does 'D' indicate in the network?
a. Power loss
b. Power gain
c. Power stability
d. Power saving
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Answer
Explanation
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ANSWER: Power loss
Explanation:
No explanation is available for this question!
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3) In accordance to the circuit configuration of bridged 'T' variable attenuator below, how many resistors should be varied in order to achieve variable attenuation?
a. Only one
b. Two
c. Three
d. Four
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Answer
Explanation
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ANSWER: Two
Explanation:
No explanation is available for this question!
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4) Variable attenuators exhibit variable attenuation but constant __________
a. Input impedance
b. Output impedance
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Both a and b
Explanation:
No explanation is available for this question!
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5) Why are the variable attenuators applicable for radio broadcasting purposes?
a. For speed control
b. For volume control
c. For time control
d. For power control
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Answer
Explanation
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ANSWER: For volume control
Explanation:
No explanation is available for this question!
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6) For the symmetrical 'T' attenuator shown below, what would be the value of shunt arm resistance with N = 10 & design impedance = 500 ohm?
a. 51.21 ohm
b. 101.01 ohm
c. 305.90 ohm
d. 409.90 ohm
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Answer
Explanation
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ANSWER: 101.01 ohm
Explanation:
No explanation is available for this question!
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7) Which type of attenuators provide a fixed amount of attenuation by allowing the user to vary the attenuation in multiple steps?
a. Ladder attenuators
b. Variable-value attenuators
c. Pad attenuators
d. All of the above
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Answer
Explanation
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ANSWER: Ladder attenuators
Explanation:
No explanation is available for this question!
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