(b) Photoelectric. When light strikes the surface of certain sensitive materials, such as selenium or cesium, electrons are released. (Solar Power) (c) Thermoelectric. Electron movement can be created by heating the connection of two dissimilar metals. If the two metals are connected to a voltage sensitive gauge, an increase in the temperature of the wire junction will increase the voltage reading. (d) Piezoelectric. Certain crystals become electrically charged when pressure is applied to the crystal. The potential difference produced increases with increased pressure. Piezoelectric are used in air pressure and fuel pressure sensors on computer-operated systems. (e) Magnetic induction. Magnetic induction occurs when is relative movement between a conductor and a magnetic field that causes the conductor to cut the lines of force surrounding the magnet. A difference of potential is set-up between the ends of the conductor and a voltage is induced. (f) Electrochemical. A battery is a chemical device that produces a voltage potential between two different metal plates submerged in an acid. Lead-acid batteries are of this type. (ON #21) (g) Voltage does not flow through a conductor; it is the pressure that the electricity. However, voltage “pushes” can be used as a signal for example, difference in voltage – levels, frequency of change, or when it is switching from positive to negative. (4) A digital voltage signal is in one of two states either on-off, yes-no, or high-low. The simplest generator of a digital signal is a switch. A is a sudden ON and OFF of electricity within a circuit. In its basic form, an on-off switch
(b) Photoelectric. When light strikes the surface of certain sensitive materials, such as selenium or cesium, electrons are released. (Solar Power) (c) Thermoelectric. Electron movement can be created by heating the connection of two dissimilar metals. If the two metals are connected to a voltage sensitive gauge, an increase in the temperature of the wire junction will increase the voltage reading. (d) Piezoelectric. Certain crystals become electrically charged when pressure is applied to the crystal. The potential difference produced increases with increased pressure. Piezoelectric are used in air pressure and fuel pressure sensors on computer-operated systems. (e) Magnetic induction. Magnetic induction occurs when is relative movement between a conductor and a magnetic field that causes the conductor to cut the lines of force surrounding the magnet. A difference of potential is set-up between the ends of the conductor and a voltage is induced. (f) Electrochemical. A battery is a chemical device that produces a voltage potential between two different metal plates submerged in an acid. Lead-acid batteries are of this type. (ON #21) (g) Voltage does not flow through a conductor; it is the pressure that “pushes” the electricity. However, voltage can be used as a signal – for example, difference in voltage levels, frequency of change, or when it is switching from positive to negative. (4) A digital voltage signal is in one of two states either on-off, yes-no, or high-low. The simplest generator of a digital signal is a switch. A is a sudden ON and OFF of electricity within a circuit. In its basic form, an on-off switch
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