Series-Parallel Circuits Questions and Answers
Series-Parallel Circuits questions with answers are frequently asked in electronics aptitude questions and answers for exams like GATE, SSC JE, and RRB JE. This topic covers the analysis of mixed circuit configurations where resistors, capacitors, or inductors are connected in both series and parallel combinations. Understanding equivalent resistance, current division, and voltage distribution is essential for solving circuit-based numerical problems accurately. In this guide, you’ll find practice questions with explanations to strengthen your conceptual understanding and problem-solving speed for competitive electronics exams.
Series-Parallel Circuits
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24 questions
11. If a series–parallel circuit has all 30-ohm resistors, what is the total resistance when R1 is in series with a parallel circuit consisting of R2 and R3?
- 10 ohms
- 20 ohms
- 45 ohms
- 90 ohms
12. Components or combinations of components with common currents, in a series–parallel circuit, are in:
- parallel with each other
- series with each other
- either series or parallel with each other
- none of the above
13. What determines if resistor connections are in series, parallel, or series–parallel?
- the voltage source
- the power source
- resistance
- current flow
14. A Wheatstone bridge can be used to determine an unknown
- current
- resistance
- power
- voltage
15. 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:
- increase
- decrease
- remain the same
- cannot tell
16. The primary function of the oscillator in an isolation amplifier is to
- convert dc to high-frequency ac
- convert dc to low-frequency ac
- rectify high-frequency ac to dc
- produce dual-polarity dc voltages for the input to the demodulator
17. An instrumentation amplifier has a high
- output impedance
- power gain
- CMRR
- supply voltage
18. Circuits that shift the dc level of a signal are called
- limiters
- clampers
- peak detectors
- dc converters
19. In the classic three-op-amp instrumentation amplifier, the differential voltage gain is usually produced by the
- first stage
- second stage
- mismatched resistors
- output op-amp