What is the function of a pull-up resistor in a switch circuit?

Practice Questions

Q1
What is the function of a pull-up resistor in a switch circuit?
  1. To increase current
  2. To ensure a defined logic level when the switch is open
  3. To decrease voltage
  4. To store charge

Questions & Step-by-Step Solutions

What is the function of a pull-up resistor in a switch circuit?
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