Q7Electronic Measurement & Instrumentation
Question
2 marks
What are interrupters and alternators.
Answer
They are devices used to supply AC power at specific frequencies to AC bridge circuits.
Interrupters and Alternators serve as the excitation power sources for AC bridge circuits.
- Alternators (or electronic oscillators): Used to generate smooth, pure sinusoidal AC voltages at specific, tunable frequencies (e.g., for audio frequency bridges).
- Interrupters (e.g., Tuning fork oscillators): Historically used mechanical devices that rapidly interrupt a DC battery supply to create a pulsating AC-like waveform for low-frequency bridges.