What characteristic of a capacitor serves to introduce a time delay in voltage variations across its terminals ?
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Answer: B. Capacitance
Explanation
Capacitors oppose instantaneous changes in terminal voltage because charging requires time to accumulate charge. This inherent opposition introduces a measurable time delay before voltage reaches its final steady value. Capacitance thus dictates the transient response speed of reactive electronic circuit networks. Capacitor voltage is proportional to accumulated charge divided by capacitance value. Resistive-capacitive time constants determine how rapidly voltages rise or fall in electronic circuits. Energy storage within the electric field prevents abrupt voltage jumps across capacitor terminals.
Engineers utilize capacitor time delays to build pulse generators, signal filters, and timing circuits. Power supply soft-start circuits use capacitors to delay voltage surges and protect downstream components. Microprocessor reset circuits rely on RC time delays to ensure stable power before starting operation. Option A suggests inductance, which introduces time delays in current variations rather than voltage variations. Option C refers to potential gradient, which describes spatial voltage changes rather than temporal delays. Option D is incorrect because capacitance is the exact characteristic responsible for voltage time delays.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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