L25.ppt - University of Iowa Physics
... • As we have seen before, friction causes heat • The collisions between the electrons and the atoms in a conductor produce heat wires get warm when they carry currents: in an electric stove this heat is used for cooking • The amount of energy converted to heat each second is called the power loss ...
... • As we have seen before, friction causes heat • The collisions between the electrons and the atoms in a conductor produce heat wires get warm when they carry currents: in an electric stove this heat is used for cooking • The amount of energy converted to heat each second is called the power loss ...
Electric current - University of Iowa Physics
... Power P = I V or I2 R Power is measured in Watts = amps volts One Watt is one Joule per second Wires are rated for the maximum current that can be handled based on how hot it can get • To carry more current you need wire of a larger diameter this is called the wire gauge, the lower the ...
... Power P = I V or I2 R Power is measured in Watts = amps volts One Watt is one Joule per second Wires are rated for the maximum current that can be handled based on how hot it can get • To carry more current you need wire of a larger diameter this is called the wire gauge, the lower the ...
![L 25 Electricity and Magnetism [3] Electric current (symbol I](http://s1.studyres.com/store/data/007903713_1-7c777a1a37e6fccaeb2ed3a9724ccb92-300x300.png)
Click here for experiment - Environmental Learning Center
... different directions they cancel each other out. Most materials are not magnetic because the electrons spin constantly in many directions and cancel each-other out. Magnets have two polls; a north and a south pole. The magnetic field travels from north to south. An electromagnet is a magnet that is ...
... different directions they cancel each other out. Most materials are not magnetic because the electrons spin constantly in many directions and cancel each-other out. Magnets have two polls; a north and a south pole. The magnetic field travels from north to south. An electromagnet is a magnet that is ...
Lesson 1: 4th Grade Science: "A Hairy Picture": Magnets Big Idea
... Electrons surround atoms in pairs. If one electron spins upward, the other spins downward. It's impossible for both of the electrons in a pair to spin in the same direction1. Even though an atom's electrons don't move very far, their movement is enough to create a tiny magnetic field. Since paired e ...
... Electrons surround atoms in pairs. If one electron spins upward, the other spins downward. It's impossible for both of the electrons in a pair to spin in the same direction1. Even though an atom's electrons don't move very far, their movement is enough to create a tiny magnetic field. Since paired e ...
DC Motors
... When energized these conditions reverse with 4 & 6 and 11 & 13 opening, while 4 & 8 and 9 & 13 close. The contacts will therefore control whatever device is connected to them. Pins 1 and 16 are the connections to the coil allowing it to energize the relay itself. The relays used in the labs are usua ...
... When energized these conditions reverse with 4 & 6 and 11 & 13 opening, while 4 & 8 and 9 & 13 close. The contacts will therefore control whatever device is connected to them. Pins 1 and 16 are the connections to the coil allowing it to energize the relay itself. The relays used in the labs are usua ...
lab_04-_parallel_circuits_and_kcl1_1
... 3. Add R3 in parallel with R1 ad R2. Measure the parallel resistance of all three resistors. Then add R4 in parallel with the other three resistors and repeat the measurement. Record your results in Table 3-2. 4. Complete the parallel circuit by adding the voltage source as shown in Figure 3-2. Meas ...
... 3. Add R3 in parallel with R1 ad R2. Measure the parallel resistance of all three resistors. Then add R4 in parallel with the other three resistors and repeat the measurement. Record your results in Table 3-2. 4. Complete the parallel circuit by adding the voltage source as shown in Figure 3-2. Meas ...
phys1444-spring12
... – So in order to make Ampere’s law work for the surface 2 in the figure, we must write it in the following form ...
... – So in order to make Ampere’s law work for the surface 2 in the figure, we must write it in the following form ...
Tutorial 11 Energy Flow
... D. Suppose the steady state surface charge on the resistor is distributed as shown in the diagram below, where there is a greater buildup of positive charge toward the bottom, zero ...
... D. Suppose the steady state surface charge on the resistor is distributed as shown in the diagram below, where there is a greater buildup of positive charge toward the bottom, zero ...
Electric Circuits
... The Battery and Potential Difference • Batteries increase the potential energy of charges in a circuit. A battery acts like a pump by increasing the energy of charges, much like a water pump gives water potential energy by pumping it to a higher level. Electric potential is the electrical poten ...
... The Battery and Potential Difference • Batteries increase the potential energy of charges in a circuit. A battery acts like a pump by increasing the energy of charges, much like a water pump gives water potential energy by pumping it to a higher level. Electric potential is the electrical poten ...
Galvanometer
A galvanometer is a type of sensitive ammeter: an instrument for detecting electric current. It is an analog electromechanical actuator that produces a rotary deflection of some type of pointer in response to electric current through its coil in a magnetic field.Galvanometers were the first instruments used to detect and measure electric currents. Sensitive galvanometers were used to detect signals from long submarine cables, and to discover the electrical activity of the heart and brain. Some galvanometers use a solid pointer on a scale to show measurements; other very sensitive types use a miniature mirror and a beam of light to provide mechanical amplification of low-level signals. Initially a laboratory instrument relying on the Earth's own magnetic field to provide restoring force for the pointer, galvanometers were developed into compact, rugged, sensitive portable instruments essential to the development of electrotechnology. A type of galvanometer that records measurements permanently is the chart recorder. The term has expanded to include use of the same mechanism in recording, positioning, and servomechanism equipment.