Internet of Things using Arduino

Detection of the light using photo resistor with Arduino

Post Test

Q1. What happens to the resistance of the photoresistor when exposed to bright light?

a) Increases

b) Decreases

c) Remains unchanged

d) Becomes infinite

Q2. In which mode does the photoresistor operate when exposed to darkness?

a) High resistance mode

b) Low resistance mode

c) Neutral mode

d) Superconductive mode

Q3. What unit is typically used to measure the resistance of a photoresistor?

a) Ohms

b) Volts

c) Amperes

d) Watts

Q4. In the Arduino code, what range of values does analogRead() return?

a) 0 to 1023

b) 0 to 255

c) -32768 to 32767

d) 0 to 65535

Q5. Which statement best describes the behavior of a photoresistor when exposed to constant light intensity?

a) Resistance remains constant

b) Resistance decreases linearly

c) Resistance increases linearly

d) Resistance fluctuates randomly