L10 S&C Electronics

What does an LDR do?

• Increases resistance with light

• Decreases resistance with light

• Only works in darkness

• Remains constant regardless of light

What is the typical resistance of an LDR in bright light?

• 120Ω

• 5MΩ

• 1kΩ

• 10MΩ

What type of thermistor has a negative temperature coefficient?

• Strain gauge

• NTC thermistor

• PTC thermistor

• LDR

What happens to the resistance of an NTC thermistor when temperature rises?

• Resistance increases

• Resistance remains the same

• Resistance fluctuates randomly

• Resistance decreases

What is a strain gauge primarily used for?

• Controlling circuits

• Detecting light

• Measuring temperature

• Measuring force or deflection

What is the nominal resistance of a typical strain gauge?

• 5Ω

• 10MΩ

• 120Ω

• 1kΩ

What is the function of a transducer?

• Change electrical current into light

• Change light, heat, or strain into electrical current

• Only detect light

• Only measure temperature

What does a Wheatstone bridge circuit measure?

• Current flow

• Voltage difference

• Resistance only

• Temperature

What happens to the voltage in a circuit with an LDR when it gets dark?

• Voltage fluctuates

• Voltage decreases

• Voltage remains constant

• Voltage increases

What is the primary use of a thermistor?

• To measure light

• To measure temperature changes

• To control voltage

• To measure strain