Internet of things using arduino
Q1. Why are push buttons commonly used in electrical circuits?
a) To control the flow of current
b) To increase the voltage
c) To decrease the resistance
d) To generate electromagnetic waves
Q2. How does the Arduino interpret the analog voltage from the potentiometer?
a) It directly applies the voltage to the motor terminals.
b) It converts the voltage to a digital signal using an analog-to-digital converter.
c) It maps the voltage to a corresponding PWM value for speed control.
d) It uses the voltage to power up the L293D motor driver.
Q3. What is the primary function of a potentiometer in an electrical circuit?
a) To switch the circuit on and off
b) To regulate the voltage across the circuit
c) To amplify the current flow in the circuit
d) To control the speed of a motor or the brightness of a light
Q4. What type of switch is a push button?
a) Toggle switch
b) Momentary switch
c) Rotary switch
d) Slide switch
Q5. Which component acts as the central processing unit of the system?
a) Potentiometer
b) Push Button
c) L293D Motor Driver
d) Arduino
