AdvancedA-001-001-003
What is the term for the time required for the current in an RL circuit to build up to 63.2% of the maximum value?
A
Answer
Advanced theory and components
Type
A
One time constant
B
An exponential period of one
C
One exponential rate
D
A time factor of one
Answer Notes
In an inductor-resistor (RL) circuit, current does not instantly reach its maximum value due to the inductor's opposition to changes in current. The rate of this build-up follows an exponential curve governed by the circuit's resistance and inductance.
The term 'time constant' specifically refers to the time it takes for the current to reach approximately 63.2% of its final maximum value. This represents the mathematical value of 1 minus 1/e.
Distractors like 'exponential period' or 'time factor' are fabricated terms meant to sound plausible. In physics and electronics, 'time constant' is the standardized, universally accepted term for this specific rate of change.
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What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the supply voltage?
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What is the term for the time it takes for a charged capacitor in an RC circuit to discharge to 36.8% of its initial value of stored charge?