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 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 hope this helps
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Resistors are tiny devices on circuit boards. Prices should range but should not be expensive but dependent on the materials used and the nature of conductivity.
The same thing they do in every circuit, resist the flow of electricity. That being said there are Many types of ossilators, and they can use resistors for many purposes.
Ceramic resistors as those that use ceramics to control a resistor's resistive value. Ceramic resistors are made of a combination of finely powdered carbon and ceramic material. These two powders combine in specific ratios to determine the final value of the resistor. Ceramic resistors are widely used in many different types of electronic circuits and devices. While these types of resistors can endure very high operation temperatures, they also create significant amounts of electrical noise. Due to this fact, a ceramic resistor seldom finds use in sensitive radio receivers or other devices particularly susceptible to interference.
A drill press is used on all types of materials, woods, metals and plastics .
most of the resistors commonly used are carbon resistors
Standard resistors are typically made of ceramic or metal film materials such as carbon film or metal oxide. Heating materials can be made from various materials like nichrome (nickel-chromium alloy), Kanthal (iron-chromium-aluminum alloy), or tungsten, which offer high resistance and heat tolerance.
Resistors are a material that resists the flow of electrons. The resistors are materials that resist electric current energy to be changed into other forms.
Resistors are a material that resists the flow of electrons. The resistors are materials that resist electric current energy to be changed into other forms.
This seems like a question from an electrical course, and is probably best answered by your course materials. It's your test question, not ours, and there won't always be someone to ask for the answer. Earn your diploma.
The different types of materials that can be used for window casing include wood, vinyl, aluminum, and composite materials.
The different types of materials used for constructing a painting stretcher include wood, aluminum, and composite materials.
Um... "resistors". There are different types, with specific names, generally based on how they're constructed, but they're still called resistors.
Dental materials are examples of materials that are used to make impressions.
non-conductive resistors are resistors made from materials which do not allow the passage or flow of electric current through them.
well its hell to you gays it is nikky
The different types of materials that can be used for a porch post base include wood, metal, concrete, and composite materials.