Electronics-Series-Parallel Circuits
Electronics-Series-Parallel Circuits
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