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Explain any two of the following: Light dependent resistor (LDR) - Leaving Cert Engineering - Question 1 - 2014
Question 1
Explain any two of the following: Light dependent resistor (LDR). Compressor. Engraving. Self-locking nut.
Worked Solution & Example Answer:Explain any two of the following: Light dependent resistor (LDR) - Leaving Cert Engineering - Question 1 - 2014
Step 1
Light dependent resistor (LDR):
Answer
A light dependent resistor (LDR) is a type of resistor whose resistance varies inversely with the intensity of light falling on it. In bright light conditions, the resistance is low, allowing more current to flow through the circuit. Conversely, in dark environments, the resistance increases significantly, reducing the current flow. This property makes LDRs useful for applications such as light sensors and automatic lighting control systems.
Step 2
Compressor:
Answer
A compressor is a mechanical device that takes in air from its surroundings and compresses it to a higher pressure. Typically, the compressed air is stored in a reservoir tank, which can then be used to power different tools or equipment. Common uses of compressed air include powering pneumatic tools, spray painting, and operating machinery. Compressors are integral in various industrial applications for efficient air distribution.