| time constant | ค่าคงตัวเวลา [พลังงาน ๒๖ ม.ค. ๒๕๔๕] |
| time constant | (n) (electronics) the time required for the current or voltage in a circuit to rise or fall exponentially through approximately 63 per cent of its amplitude |
| time constant | (n) the ratio of the inductance of a circuit in henries to its resistance in ohms |