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LDR Applications and Function Quiz

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Questions and Answers

What is the primary function of an LDR?

To decrease light intensity by detecting light levels (correct)

To convert light into electrical energy for storage

To heat objects based on temperature changes

To increase light intensity when exposed to brightness

Which of the following is NOT a use of a thermistor?

Thermostat

Turning lights on in the dark (correct)

Digital thermometer

Heating

In which application would you find LDRs being used?

Controlling the speed of a motor

Monitoring temperature changes for heating systems

Adjusting the brightness of street lights automatically (correct)

Measuring voltage in electrical circuits

What type of sensor is a thermistor classified as?

Temperature sensor Signup and view all the answers

What is a common use for LDRs in photography?

Adjusting camera settings based on light levels Signup and view all the answers

What is the unit of potential difference?

Volt Signup and view all the answers

What must be present for current to flow around a circuit?

A potential difference Signup and view all the answers

What is the unit of current?

Ampere Signup and view all the answers

In a single, closed loop circuit, how does the current behave?

It has the same value everywhere Signup and view all the answers

What is resistance in an electrical circuit?

Anything that opposes the flow of current Signup and view all the answers

Study Notes

LDR (Light Dependent Resistor) Function

An LDR uses light intensity to adjust resistance.
It decreases light intensity.

LDR Applications

Heating: Used in heating systems.
Thermostats: Used to control temperature.
Digital thermometers: Used to measure temperature digitally.
Turning lights on in the dark: Used in automatic lighting systems.
Light meters: Used to measure light levels.

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Description

Test your knowledge on Light Dependent Resistors (LDRs) and their various applications. This quiz covers how LDRs operate based on light intensity, as well as their uses in heating systems, thermostats, digital thermometers, and automatic lighting. Prepare to explore the fascinating world of LDR technology!