A resistive transducer works by changing its level of electrical resistance depending on the condition of another object or process, allowing any changes to be detected without direct observation of the condition or object. There are many types of resistive transducers, from those that measure movement to those that measure temperature, strain, pressure or some other quantity. They have a wide variety of structures to accomplish these goals.Know More
All resistive tranducers rely on measuring the resistance to electrical currents. The variations in this resistance can indicate many different events. One simple type is the sliding contact transducer. One end of this transducer is fixed. A slider is attached to a moving object and moves along the transducer. A current is passed through, and the resistance in the transducer to the current grows the further away from the fixed end the object moves.
Thermistors are another type of resistive transducer that measures temperature. They usually rely on certain semiconductive ceramics, such as metal oxides. The electrical resistance of these materials varies depending on temperature. The resistance is easily detected and can indicate the temperature of the semiconductor. The thermocouple, a resistive transducer that uses two dissimilar materials placed end to end, is another type of temperature sensor.Learn more about Motion & Mechanics
An inclined plane works by reducing the amount of force needed to lift an object from a lower point to a higher one. The inclined plane is normally a flat surface that extends from the lowest point up to the highest, which allows things to be moved up and down the incline easier than lifting it straight up or down.Full Answer >
The work-energy theorem is a generalized description of motion that states that the work done by the sum of all forces acting on an object is equal to the change in that object's kinetic energy. This principle of work and its relationship to kinetic energy is a core mechanical physics concept.Full Answer >
Digital thermometers work on the principle that changes in temperature cause the resistance of a sensor to change allowing a computer to convert the difference to a digital read-out. The sensor is a thermoresistor, commonly called a thermistor, according to HowStuffWorks.com.Full Answer >
Friction is a resistive, physical-contact force that impedes motion. It occurs as a result of microscopically uneven surfaces, which are present even when the surfaces appear smooth to the human eye. If surfaces were perfectly smooth and in a vacuum, friction would not exist.Full Answer >