Smart Materials and Systems

Which one of the following smart materials does not react to electricity?

• Shape memory alloy

• Quantum tunnelling compound

• Thermochromic pigment

• Piezoelectric material

Which smart material can be both a conductor and an insulator?

• Piezoelectric material

• Quantum tunnelling compound

• Shape memory alloy

• Thermochromic pigment

Explain one disadvantages of using photochromic particles with self-darkening glasses.

The following question is about the shape memory alloy, nitinol.

Nitinol is an alloy of nickel and which other metal?

Which one of the following components is used to detect light levels?

• Resistor

• LDR

• Thermistor

• LED

Which one of the following is an output component?

• Speaker

• PTM switch

• Pressure pad

• Microphone

Explain the functional difference between a closed loop system and an open loop system.

An electronic circuit is drawn using ___________ diagrams.

Which of these is used to restrict the flow of electricity?

• LED

• Resistor

• Thermistor

• Capacitor

Which of these in an input component?

• Resistor

• LDR

• Toggle Switch

• Buzzer