# What is a resistor?

Answer A resistor is a device that resists, or limits, the flow of electric current through itself. The more resistance a thing has, the more it limits current (at the …same voltage). In a circuit, resistance and current are inversely proportional. The more the resistance, the more current will be limited and the less current will actually flow. Resistors pay a price for limiting current - they create heat. In other words, resistors convert electrical energy into heat energy. It might be convenient to divide resistors into just two groups for this discussion (though there are many possible ways to catagorize them). Resistors might be though of as electronic components, or as thermal elements in a device or equipment. A resistor "sorta" conducts current flow, but it heats up as a consequence to having current "forced" through it by some applied voltage. If the resistor is an appliance, it is probably being used specifically to generate the heat, because the heat is what is desired. We need to dry our hair, or the clothes. We want to make toast or coffee or bacon. Incandescent lights could be seen as resistors, but we don't (usually) use them to generate heat. Heating elements, or thermal elements, are heaters - resistive heaters. In electronics equipments, resistors are included in circuit designs to "develop" voltage and to limit current. They are an integral part of the electronics world, and anyone entering in will be seeing them and solving a number of problems with resistance, current and voltage within a short time of arriving.

# What do resistors do?

Resistance: Electrical resistance describes how an electrical conductor (a wire) opposes the flow of an electrical current (flow of electrons). To overcome this op…position 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: Â· Variable Resistor - changes resistance when its shaft is rotated (volume knob on a stereo). Â· Thermistor - changes resistance when the temperature changes (used in a thermostat). Â· 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 flowâ€¦ 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

# What is the resistor?

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The resistor for the HVAC blower motor gives you all the lower speeds. High speed is separate.

# What are resistors?

A resistor is an electrical device that limits current in a circuit. It converts electrical energy into thermal energy (heat), and drops voltage. Conductors in an electrical c…ircuit allow current to flow through them will little resistance. The medium in a resistor, the resistive material, is not a good conductor, and will "resist" the current that wants to flow through it. This is how it limits current in a circuit. A resistor is rated according to its resistance and it ability to dissipate heat. It will be rated in ohms of resistance and in watts. A one ohm resistor will allow one amp of current to flow through it when one volt is applied across it. It will generate one watt of thermal energy, which it will have to dissipate as heat. A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit. Resistors can also be used to provide a specific voltage for an active device such as a transistor.

# What does a resistor do?

A resistor dissipates a definite, calculated, desired amount of electrical energy. Resistor with its resistance would provide a drag to the free flow of electrons. Hence curr…ent gets reduced. 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: Â· Variable Resistor - changes resistance when its shaft is rotated (volume knob on a stereo). Â· Thermistor - changes resistance when the temperature changes (used in a thermostat). Â· 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 flowâ€¦ 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

# What is a brake?

A devise to slow or stop a moving object.

# How do you do the brakes?

place pressure on the pedal with your foot (preferably)

# What do resistor do?

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 v…oltage (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: Â· Variable Resistor - changes resistance when its shaft is rotated (volume knob on a stereo). Â· Thermistor - changes resistance when the temperature changes (used in a thermostat). Â· 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 flowâ€¦ 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) x 0.02 = 0.2 Watts

# Define thyristor controlled braking resistor?

A braking resistor is used in motion systems where a motor in controlled by a drive. Typically, these are high-speed servomotors controlled by a servodrive. When accelerating,… electrical energy is converted to a mechanical force to move a mass. When decelerating, that kinetic energy is converted (via the motor) back into electrical energy, and must go somewhere. To brake quick enough, the energy must be dumped into a power resistor, to be dissipated as heat. A thyristor (also known as a silicon-controlled rectifier or SCR) is a diode which has a gate terminal on it. Current at the gate allows the thyristor to go into a conducting mode, allowing current to pass. Modern drives will detect when their DC bus voltage reaches a certain threshold (from the energy being returned from the motor during braking) and begin triggering the thyristor periodically (typically PWM, pulse-width modulation) to disperse this energy as heat. See links.

# What do brakes do?

A vehicals brakes convert kinetic energy into thermal energy through friction and dissipate the thermal energy into the atmosphere

# Why you use resistor with variable resistor?

Often we want to easily change a resistor value, so we use a variable resistor. For example, we may want to change the resistor that controls the power sent to a LED, so we …can easily make it brighter or dimmer. Often if we use a variable resistor, there is only a very narrow range that is useful. Continuing our example, sometimes we use several LEDs, and we use the variable resistor to set them all to the same brightness. In this case, the resistance range that sets the LED to be twice as bright as the the other LEDs, and the resistance range that sends so much power to the LED that it is permanently destroyed is even less useful. So we add a fixed resistor in series with the variable resistor -- the fixed resistor sets the minimum net resistance, no matter how we turn the knob on the variable resistor. In our example, the addition of the fixed resistor allows us to turn the variable resistor throughout its whole range, and the LED gets brighter and dimmer; without that resistor, a certain range of the knob on the variable resistor would allow so much power to go to the LED that it would be destroyed.

# What is your observation of resistors in parallel resistors?

RParallel = 1 / Summationi=1toN (1 / Ri)

Answered

In Uncategorized

# What are resistor and variable resistor?

Resistor is an electrical device which limits current in a circuit.It convert electrical energy into thermal energy and drops voltage.Conductor allow current to flow with litt…le resistance.The resistive material in the resistor is not a good conductor and resist the current that wants to flow through it. Variable resistor is such type of resistor whose resistance can be changed depending upon the need.They mostly used in electronic devices e.g a speaker. They made of 60% copper and 40% nickel.While other resistors are made of carbon.

Answered

# What is braking?

Braking is the action of applying pressure, in an attempt to stop an object. This could be a car, bike, scooter ect.

Answered

In Technology

# What happen when you remove braking resistor on the inverter?

The system will lose it's regenerative braking function, if there is no other means to stop the motor it will coast to a stop.

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In Science

# Resistor do what?

Resistor offers a resistance to the flow of electric current. It is mainly in the form of attractive force applied on the moving electrons by the positive nucleus.

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In Technology

# What resistor is this?

There are 2 main resistor color code systems in use today: 3 or 4 band for standard resistors and 5 or 6 band for precision resistors. The full coding for multiplier digit…, tolerance digit, and temperature coefficient bands is too complicated to fully explain here, as they include several special case exceptions. Standard resistors: 10s digit 1s digit multiplier digit optional tolerance - no band 20%, silver 10%, gold 5% Precision resistors: 100s digit 10s digit 1s digit multiplier digit tolerance digit - numeric % from 1% to 5% optional temperature coefficient