Questions

As we conclude, here is a list of questions for you to test your knowledge regarding this chapter's material. You will find the answers in the Assessments section of the book:

1. You have a circuit that requires a 200Ω resistor, but you only have a 330Ω resistor available. It is safe to use this value?

2. You substitute a higher value resistor in a circuit but the circuit does not work. With respect to Ohm's Law, what could be the problem?
3. You calculated a suitable resistor value for a circuit using Ohm's Law, but when you applied power to the circuit, the resistor started to discolor and let off smoke. Why?
4. Assuming GPIO 21 is configured via Python as an input pin and it is connected by a wire directly to the +3.3-volt pin, what value will pi.read(21) return?

5. You have a push button set up so that when it's pressed, it connects GPIO 21 to a GND pin. When the button is not pressed, you notice that your program is erratic and appears...