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A sensing unit can consist of additional components such as filters, amplifiers, and modulators.
True
The actuating unit consists of an actuator, a power supply, and a coupling mechanism.
False
When a transducer converts a measurable quantity to an electrical voltage or current, it is called a sensor.
True
An instrument refers to a sensor together with its associated electronics.
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A measurement system requires several transformation steps before the electric output signal can be generated.
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Actuators convert an electrical signal into another form of energy, such as sound.
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Passive sensors do not require any additional energy source and directly generate an electric signal in response to an external stimulus.
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Active sensors do not require external power for their operation.
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Digital sensors produce a continuous and proportional signal.
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Analog sensors produce a continuous and proportional signal.
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Thermistors are an example of active sensors.
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A photovoltaic cell requires external power to produce electricity.
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Human eyes are an example of sensors that detect light energy.
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The brain directly outputs a response to the signals received from the sensors.
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Physical sensors detect physical quantities such as force, heat, and light.
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Passive sensors incorporate active electronic components such as amplifiers and IC.
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