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Series-Parallel Circuits

Study 29 Electrical Engineering MCQs with correct answers and explanations.

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11Electrical EngineeringMedium

In a series–parallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2‘s voltage will:________?

Acannot tell

Bincrease

Cdecrease

Dremain the same

Correct answer

C. decrease

Explanation

The correct answer is decrease.

12Electrical EngineeringMedium

On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?

A50 V

B500 V

C1 V

D1,000 V

Correct answer

D. 1,000 V

Explanation

The correct answer is 1,000 V.

13Electrical EngineeringMedium

The parallel combination of a 470 Ω resistor and a 680 Ω resistor is in series with the parallel combination of four 2 kΩ resistors. The total resistance is________?

A1,078 Ω

B778 Ω

C1,650 Ω

D77.8 Ω

Correct answer

B. 778 Ω

Explanation

The correct answer is 778 Ω.

14Electrical EngineeringMedium

In a series–parallel circuit, individual component power dissipation are calculated using________?

Aa percent of the voltage division ratio squared

Btotal current squared multiplied by the resistor values

Ca percent of the total power depending on resistor ratios

Dindividual component parameters

Correct answer

D. individual component parameters

Explanation

The correct answer is individual component parameters.

15Electrical EngineeringMedium

The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is________?

A100,000 Ω

B200,000 Ω

C1,000,000 Ω

D20,000 Ω

Correct answer

A. 100,000 Ω

Explanation

The correct answer is 100,000 Ω.

16Electrical EngineeringMedium

A device able to supply electrical energy is a ________?

Abattery

Bconductor

Cmicrowave

Dnonconductor

Correct answer

A. battery

Explanation

The correct answer is battery.

17Electrical EngineeringMedium

In a certain five-step R/2R ladder network, the smallest resistor value is 1 kΩ. The largest value is________?

A20 kΩ

BIndeterminable

C10 kΩ

D2 kΩ

Correct answer

D. 2 kΩ

Explanation

The correct answer is 2 kΩ.

18Electrical EngineeringMedium

When a Wheatstone bridge is in a balanced condition, the center voltmeter in the bridge will read________?

Ahalf the source voltage

Bthe same as the source voltage

Ctwice the source voltage

Dzero volts

Correct answer

D. zero volts

Explanation

The correct answer is zero volts.

19Electrical EngineeringMedium

A Wheatstone bridge can be used to determine an unknown________?

Aresistance

Bvoltage

Cpower

Dcurrent

Correct answer

A. resistance

Explanation

The correct answer is resistance.

20Electrical EngineeringMedium

A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage?

A100 kΩ

B1 kΩ

C330 Ω

D1 MΩ

Correct answer

D. 1 MΩ

Explanation

The correct answer is 1 MΩ.

In a series–parallel circuit, individual component power dissipation are calculated using________?

Aa percent of the voltage division ratio squared

Btotal current squared multiplied by the resistor values

Ca percent of the total power depending on resistor ratios

Dindividual component parameters

Correct answer

D. individual component parameters

Explanation

The correct answer is individual component parameters.