Series-Parallel Circuits Questions and Answers

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Showing 10 of 24 questions
Q11
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?
  • A 10 ohms
  • B 20 ohms
  • C 45 ohms
  • D 90 ohms
Answer: Option C
Q12
Components or combinations of components with common currents, in a series–parallel circuit, are in:
  • A parallel with each other
  • B series with each other
  • C either series or parallel with each other
  • D none of the above
Answer: Option C
Q13
What determines if resistor connections are in series, parallel, or series–parallel?
  • A the voltage source
  • B the power source
  • C resistance
  • D current flow
Answer: Option D
Q14
A Wheatstone bridge can be used to determine an unknown
  • A current
  • B resistance
  • C power
  • D voltage
Answer: Option B
Q15
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:
  • A increase
  • B decrease
  • C remain the same
  • D cannot tell
Answer: Option B
Q16
The primary function of the oscillator in an isolation amplifier is to
  • A convert dc to high-frequency ac
  • B convert dc to low-frequency ac
  • C rectify high-frequency ac to dc
  • D produce dual-polarity dc voltages for the input to the demodulator
Answer: Option A
Q17
An instrumentation amplifier has a high
  • A output impedance
  • B power gain
  • C CMRR
  • D supply voltage
Answer: Option C
Q18
Circuits that shift the dc level of a signal are called
  • A limiters
  • B clampers
  • C peak detectors
  • D dc converters
Answer: Option B
Q19
In the classic three-op-amp instrumentation amplifier, the differential voltage gain is usually produced by the
  • A first stage
  • B second stage
  • C mismatched resistors
  • D output op-amp
Answer: Option A
Q20
Typical isolation amplifiers use optical coupling.
  • A TRUE
  • B FALSE
Answer: Option B

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