For any given load, the higher the supply voltage, the lower the load current. So we use very high voltages on transmission/distribution lines in order for the load current to be low enough to enable us to use conductors of practical size. Furthermore, if we were to use low voltages, the resulting load current would be so high that there would be an absolutely enormous voltage drop -so much so that it would be impossible to transfer the required energy. Low currents also mean less line losses.
The alternator output voltage in most modern 12 volt automotive systems ranges from 13.5V to 14.5V, with the nominally accepted value being 13.8V. The actual voltage depends on battery charge state and temperature.
Resistance:Electrical resistance describes how an electrical conductor (a wire) opposes the flow of an electrical current (flow of electrons). To overcome this opposition a voltage (a energy) must dropped (used) across the conductor (wire). Resistance can be described by ohms law:Ohms Law: R = V / I (Resistance = Voltage / Current) (resistance measured in ohms)where:Voltage [V]= the energy lost across an component (voltage measured in volts).Current [I] = the charge (electrons) flowing through an component (current measured in Amps).Electrical resistance can be thought of as sticking your hand out a car window. The faster [current] you drive the harder the wind presses [resistance] against you hand and therefore it takes more energy [voltage] to hold your hand steady.When trying to overcome electrical resistance, the electrical energy lost is turned into heat. This is how the elements of a household stove, toaster, and fan heater work. Because of the vacuum in a light bulb, the electrical energy lost is instead turned into light. It can be seen the electrical resistance plays a large role in modern life.Resistor:The resistor is the most common electronic component and is used to limit and/or control the voltage and current in an electronic circuit. Resistors are carefully manufactured to provide a predetermined value of electrical resistance which may range from 0.1 ohms to 100,000,000 ohms, depending on the application. The physical size of a resistor also varies dependant on the amount of power passing through the resistor, given by:P = V x I (Power = Voltage x Current) (power measured in watts)There are also many types of resistors including:· Variable Resistor - changes resistance when its shaft is rotated (volume knob on a stereo).· Thermistor - changes resistance when the temperature changes (used in a thermostat).· Light Dependant Resistor (LDR) - changes resistance when the lighting changes (used in children's night-lights).Resistor Example:An LED is a small red light (such as the one on the front of most TVs) and requires 2.0 volts and 0.02 amps to operate correctly. If we connected that LED up directly to a 12 volt battery, the voltage would be too high, and too much current would flow… the LED would blow up. We need to use a resistor to limit the voltage and current.But which value of resistance should the have resistor? Uses ohms law:R = V / I = (12.0 - 2.0) / 0.02 = 500 ohms(Note: the voltage across the resistor is the battery voltage minus the voltage we want across the LED)But which value of power should the resistor be capable of handling?P = V x I = (12.0 - 2.0) / 0.02 = 0.2 Wattshope this helpsofiu9njkgugi The main function of resistor is to control the electric current passing through the system. In automobile it is used in many areas like Body Areas & Cabin Controls, Integrated Drive Train & Starter/Alternators (including 42V systems), DC/DC Converters, Lighting Supplies, Engine Management & Ignition/Injection System and Hybrid/Electric Vehicle.
Resistance: Electrical resistance describes how an electrical conductor (a wire) opposes the flow of an electrical current (flow of electrons). To overcome this opposition a voltage (a energy) must dropped (used) across the conductor (wire). Resistance can be described by ohms law: Ohms Law: R = V / I (Resistance = Voltage / Current) (resistance measured in ohms) where: Voltage [V]= the energy lost across an component (voltage measured in volts). Current [I] = the charge (electrons) flowing through an component (current measured in Amps). Electrical resistance can be thought of as sticking your hand out a car window. The faster [current] you drive the harder the wind presses [resistance] against you hand and therefore it takes more energy [voltage] to hold your hand steady. When trying to overcome electrical resistance, the electrical energy lost is turned into heat. This is how the elements of a household stove, toaster, and fan heater work. Because of the vacuum in a light bulb, the electrical energy lost is instead turned into light. It can be seen the electrical resistance plays a large role in modern life. Resistor: The resistor is the most common electronic component and is used to limit and/or control the voltage and current in an electronic circuit. Resistors are carefully manufactured to provide a predetermined value of electrical resistance which may range from 0.1 ohms to 100,000,000 ohms, depending on the application. The physical size of a resistor also varies dependant on the amount of power passing through the resistor, given by: P = V x I (Power = Voltage x Current) (power measured in watts) There are also many types of resistors including: · Variable Resistor - changes resistance when its shaft is rotated (volume knob on a stereo). · Thermistor - changes resistance when the temperature changes (used in a thermostat). · Light Dependant Resistor (LDR) - changes resistance when the lighting changes (used in children's night-lights). Resistor Example: An LED is a small red light (such as the one on the front of most TVs) and requires 2.0 volts and 0.02 amps to operate correctly. If we connected that LED up directly to a 12 volt battery, the voltage would be too high, and too much current would flow… the LED would blow up. We need to use a resistor to limit the voltage and current. But which value of resistance should the have resistor? Uses ohms law: R = V / I = (12.0 - 2.0) / 0.02 = 500 ohms (Note: the voltage across the resistor is the battery voltage minus the voltage we want across the LED) But which value of power should the resistor be capable of handling? P = V x I = (12.0 - 2.0) / 0.02 = 0.2 Watts
Resistance: Electrical resistance describes how an electrical conductor (a wire) opposes the flow of an electrical current (flow of electrons). To overcome this opposition a voltage (a energy) must dropped (used) across the conductor (wire). Resistance can be described by ohms law: Ohms Law: R = V / I (Resistance = Voltage / Current) (resistance measured in ohms) where: Voltage [V]= the energy lost across an component (voltage measured in volts). Current [I] = the charge (electrons) flowing through an component (current measured in Amps). Electrical resistance can be thought of as sticking your hand out a car window. The faster [current] you drive the harder the wind presses [resistance] against you hand and therefore it takes more energy [voltage] to hold your hand steady. When trying to overcome electrical resistance, the electrical energy lost is turned into heat. This is how the elements of a household stove, toaster, and fan heater work. Because of the vacuum in a light bulb, the electrical energy lost is instead turned into light. It can be seen the electrical resistance plays a large role in modern life. Resistor: The resistor is the most common electronic component and is used to limit and/or control the voltage and current in an electronic circuit. Resistors are carefully manufactured to provide a predetermined value of electrical resistance which may range from 0.1 ohms to 100,000,000 ohms, depending on the application. The physical size of a resistor also varies dependant on the amount of power passing through the resistor, given by: P = V x I (Power = Voltage x Current) (power measured in watts) There are also many types of resistors including: · Variable Resistor - changes resistance when its shaft is rotated (volume knob on a stereo). · Thermistor - changes resistance when the temperature changes (used in a thermostat). · Light Dependant Resistor (LDR) - changes resistance when the lighting changes (used in children's night-lights). Resistor Example: An LED is a small red light (such as the one on the front of most TVs) and requires 2.0 volts and 0.02 amps to operate correctly. If we connected that LED up directly to a 12 volt battery, the voltage would be too high, and too much current would flow… the LED would blow up. We need to use a resistor to limit the voltage and current. But which value of resistance should the have resistor? Uses ohms law: R = V / I = (12.0 - 2.0) / 0.02 = 500 ohms (Note: the voltage across the resistor is the battery voltage minus the voltage we want across the LED) But which value of power should the resistor be capable of handling? P = V x I = (12.0 - 2.0) / 0.02 = 0.2 WattsNote: k = x1,000 M = x1,000,000 G = x1,000,000,000So a 10k resistor = 10kohms = 10,000ohms
A Multi-tasking system is a system that can handle multiple tasks at the same time. Modern operating systems (Windows XP for example) can run multiple programs at the same time, and are a good example of multitasking systems
Mainly because they have poorly developed electrical & data distribution systems.
To construct electrical systems upon which we base modern society.
Thomas Edison is primarily associated with the field of electrical engineering and invention. He made significant contributions to the development of electrical power generation and distribution, as well as advancements in communication technologies like the phonograph and the incandescent light bulb. His work laid the groundwork for modern electrical systems and numerous technological innovations.
Tesla invented the alternating-current generator that provides your light and electricity, the transformer through which it is sent, and even the high voltage coil of your picture tube. The Tesla Coil, in fact, is used in radios, television sets, and a wide range of other electronic equipment - invented in 1891, no-one's ever come up with anything better.
Most modern alternators have the voltage regulator inside the alternator housing, so you have to take the vehicle to a automotive electrical shop to have the electrical system tested, unless you want to pull the alternator and take that in.
Nikola Tesla's first research involved developing alternating current (AC) electrical systems, including the invention of the Tesla coil, which laid the foundation for modern electrical power distribution. Tesla also explored wireless communication and transmission, making significant contributions to radio technology.
methane
The alternator output voltage in most modern 12 volt automotive systems ranges from 13.5V to 14.5V, with the nominally accepted value being 13.8V. The actual voltage depends on battery charge state and temperature.
It needs the battery to store enough energy to restart the engine when it has been turned off. Without the battery you would have to start the engine manually with a crank (as they did on early cars before the invention of the electric starter). Also, the battery is a critical part of the voltage regulator system for the alternator used in modern car electrical systems to prevent variations in the voltage of the electrical system with changes in engine speed, etc.
Michael Faraday is credited with the discovery of the electric dynamo. In the early 1830s, he demonstrated the principle of electromagnetic induction, which is the foundation for the operation of dynamos, generators, and electric motors. Faraday's work laid the groundwork for the development of modern electrical power generation and distribution systems.
Nikola Tesla's greatest achievement was likely his development of alternating current (AC) electrical systems, which revolutionized the transmission and distribution of electricity. His work in AC power laid the foundation for the modern electrical grid and enabled the widespread adoption of electrical technology.
All modern day computers are built using electronic or semiconductor processors and components, so these are electronic systems which of course need electrical power to operate but are not in general put under category of electrical devices.