Conductors, Semiconductors and Insulators Quiz

What are the charged particles in a conductor free to do?

• Stay stationary within the atomic structure

• Reflect light

• Absorb energy from the circuit

• Move around and flow as an electric current

What is the term used for materials where the charge carriers are locked into the atomic structure and not free to move?

• Conductor

• Thermistor

• Insulator

• Semiconductor

What happens to a thermistor when heat is applied to it?

• It becomes a better conductor

• It absorbs heat

• It emits light

• It becomes an insulator

What happens to an LDR when light photons cause the electrons to escape?

• It becomes an insulator

• It becomes a better conductor

• It emits heat

• It absorbs light

What is the term used for a material that can be a regular conductor or not depending on the energy given to it?

• Semiconductor

• Insulator

• Conductor

• Thermistor

What effect does having more light to a semiconductor in an LDR, have on the number of charge carriers?

• Decreases the number of charge carriers

• Increases the number of charge carriers

• Does not affect the number of charge carriers

• Causes the charge carriers to move faster

What can liberate charge carriers in a thermistor?

• Electricity

• Temperature

• Magnetism

• Light

What is the term used for a material with a number of charge carriers somewhere between a conductor and an insulator?

• Conductor

• Semiconductor

• Insulator

• Thermistor

What does LED stand for?

• Light Emitting Diode

• Light Emitting Display

• Light Emitting Device

• Laser Emitting Diode

What is the primary function of an LED?

• To regulate temperature.

• To transmit data.

• To store energy.

• To emit light.