The waveform of sinusoidal voltage, its frequency and phase can be found by:
Correct answer: A. CRO (Cathode Ray Oscilloscope)
- A. CRO (Cathode Ray Oscilloscope)
- B. Diode
- C. Transistor
- D. Radio
Explanation
The correct answer is CRO (Cathode Ray Oscilloscope). A CRO is designed to visually display the waveform of electrical signals, allowing users to measure and analyze the signal's frequency, amplitude, and phase. It is a versatile tool used in laboratories and for troubleshooting electronic devices. On the other hand, a diode, transistor, and radio serve different purposes and are not capable of displaying or analyzing waveforms.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
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About AC Through Resistor, Capacitor and Inductor
Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.
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