Electrical Engineering MCQs

Page No. 14

A certain circuit is composed of two parallel resistors. The total resistance is 1,403 Ω. One of the resistors is 2 kΩ. The other resistor value is____________?


a1,403 Ω

✖


b4.7 kΩ

✓


c2 kΩ

✖


d3,403 Ω

✖


View Answer 4.7 kΩ

A certain Wheatstone bridge has the following resistor values: R1 = 10 kΩ, R2 = 720 Ω, and R4 = 2.4 kΩ. The unknown resistance is_____________?


a24 Ω

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b2.4 Ω

✖


c300 Ω

✖


d3,000 Ω

✓


View Answer 3,000 Ω

A 12 kΩ resistor, a 15 kΩ resistor, and a 22 kΩ resistor are in series with two 10 kΩ resistors that are in parallel. The source voltage is 75 V. Current through the 15 kΩ resistor is approximately___________?


a14 mA

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b 1.4 mA

✓


c5 mA

✖


d50 mA

✖


View Answer 1.4 mA

A voltage divider consists of two 68 kΩ resistors and a 24 V source. The unknown output voltage is______________?


a12 V

✓


b24 V

✖


c0 V

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d6 V

✖


View Answer 12 V

A gain of 1000 times in voltage is expressed by_______________?


a60 db

✓


b30 db

✖


c120 db

✖


d600 db

✖


View Answer 60 db

The upper or lower cut off frequency is also called______________frequency?


aResonant

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b Sideband

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c3 db

✓


dNone of the above

✖


View Answer 3 db

The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?


a2 W

✖


b 6 W

✖


c68 W

✓


dNone of the above

✖


View Answer 68 W

The number of stages that can be directly coupled is limited because___________?


a Changes in temperature cause thermal instability

✓


bCircuit becomes heavy and costly

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cIt becomes difficult to bias the circuit

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dNone of the above

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The bandwidth of a single stage amplifier is_____________that of a multistage amplifier?


aMore than

✓


bThe same as

✖


cLess than

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d Data insufficient

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View Answer More than

The output of a microphone is rated at -52 db. The reference level is 1V under specified conditions. What is the output voltage of this microphone under the same sound conditions?


a5 mV

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b2 mV

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c8 mV

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d5 mV

✓


View Answer 5 mV

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