QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED
●● What is the symbol for an LDR?
Answer: The symbol for a Light Dependent Resistor (LDR) is typically
represented as a resistor symbol with arrows indicating light.
●● How does an LDR work?
Answer: An LDR works by changing its resistance based on the amount
of light it receives; more light results in lower resistance.
●● What is the photoelectric effect?
Answer: The photoelectric effect is the phenomenon where electrons are
emitted from a material when it absorbs light or electromagnetic
radiation.
●● What is a semiconductor?
Answer: A semiconductor is a material that has electrical conductivity
between that of a conductor and an insulator, often used in electronic
devices.
●● What is a conductor?