Вопрос 247What is the time constant of a circuit having two 220-microfarad capacitors and two 1-megohm resistors, all in parallel?
- 55 seconds
- 110 seconds
- 440 seconds
- 220 seconds✓Правильный ответ
Объяснение
Capacitances in parallel add, giving 440 µF, while equal resistances in parallel halve, giving 500 kΩ. Their product is 220 seconds.