Advanced Qualification · A-001 Advanced theory · A-001-001-002
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?
- AOne exponential period
- BOne time constant
- CAn exponential rate of one
- DA time factor of one
Correct answer: B — One time constant. From the official ISED question bank, verified word for word.
Why
In an RC circuit, the time it takes for a capacitor to reach 63.2% of the supply voltage is defined as one time constant. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced theory is section A-001 of the Advanced exam: Advanced theory: time constants, reactance, impedance, resonance, Q, and the mathematics behind tuned circuits.
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