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What has the least amount of resistance a semi conductor insulator resistor or a conductor?
Wiki User
∙ 14y ago
Traditionally, a conductor has the least resistance of the three, followed by the semiconductor and finally the resistor.
Wiki User
∙ 14y ago
Wiki User
∙ 6y agoResistance becomes lower as the cross sectional are of the conductor becomes larger. Hence higer the diameter of the conductor lower the resistance.
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What is the difference between resistor and insulator?
A resistor lets electricity flow, but in a calculated restriction of amount. An insulator prevents electricity from flowing across it - period.
Is a wood log a insulator or an conductor?
Wood in itself is an insulator. But when wet, the water particles can conduct electricity.. Hence wet wood will be a conductor, although not a very good conductor, since the current passes only through a very small area
Describe the purpose of the coloured bands on a resistor?
The purpose of colored bands on a resistor is to tell whoever is installing the resistor the amount of resistance that particuliar resistor has.
What do you mean by heating effect of current?
The heating effect of current refers to the phenomenon where the flow of electric current through a conductor leads to the production of heat. This occurs due to the resistance offered by the conductor to the flow of electrons. The amount of heat produced is directly proportional to the square of the current and the resistance of the conductor.
Does the amount of heat produced depend on the material of the conductor?
Yes, resistance in a conductor causes energy losses due to heat. Metals such as Gold and Platinum have very low resistance but they are very expensive so Copper and Aluminium are used instead which are much more affordable but have higher resistance.
How is a resistor different from a fuse?
A resistor is a material that attenuates the current through a conductor. An insulator isolates the conductor from the surrounding material.
What is the difference between resistor and insulator?
A resistor lets electricity flow, but in a calculated restriction of amount. An insulator prevents electricity from flowing across it - period.
Is a wood log a insulator or an conductor?
Wood in itself is an insulator. But when wet, the water particles can conduct electricity.. Hence wet wood will be a conductor, although not a very good conductor, since the current passes only through a very small area
Describe the purpose of the coloured bands on a resistor?
The purpose of colored bands on a resistor is to tell whoever is installing the resistor the amount of resistance that particuliar resistor has.
What is a resistor for?
A Resistor Is Used To Limit The Current In A CircuitFurther AnswerA resistor is sometimes used to modify the natural resistance of a circuit -e.g. by adding a resistor in series, you can increase the natural resistance; by adding a resistor in parallel, you can decrease the natural resistance. Two or more resistors can be used to create a voltage divider -a method of obtaining a voltage lower than the supply voltage in a d.c. circuit.Use of resistor is to produce a particular amount of resistance to the flow of current
What is resistor used for?
A Resistor Is Used To Limit The Current In A CircuitFurther AnswerA resistor is sometimes used to modify the natural resistance of a circuit -e.g. by adding a resistor in series, you can increase the natural resistance; by adding a resistor in parallel, you can decrease the natural resistance. Two or more resistors can be used to create a voltage divider -a method of obtaining a voltage lower than the supply voltage in a d.c. circuit.Use of resistor is to produce a particular amount of resistance to the flow of current
What do you mean by heating effect of current?
The heating effect of current refers to the phenomenon where the flow of electric current through a conductor leads to the production of heat. This occurs due to the resistance offered by the conductor to the flow of electrons. The amount of heat produced is directly proportional to the square of the current and the resistance of the conductor.
What is the basic difference between conductors and insulators?
The difference between a conductor and a insulator is that a conductor tries to keep the warmness away and the insulator tries to keep the warmness in. An insulator is like an refrigerator, and mabey a cooler so when you go hiking it keeps the coolness inside or keeps the warmness inside!!:-)<3
Can a copper wire be used as a variable resistor in a circuit?
Because copper is a very good conductor, it isn't used for making the main body of a resistor. The body must be made of high resistance metals, such as nickel and chrome alloys. Copper is only used for making the connecting leads of a resistor.
How does a resistor help an electric heater?
An electric heater is a resistor. It is a resistor with the right amount of resistance to take the required amount of power at the specified voltage. With a case to put it in and louvres to let the warm air circulate, that is a heater.Resistance in ohms is equal to the voltage-squared and divided by the watts.
What are the factors that affect the resistance of a conductor?
the amount of fluctuating current and heat will effect resistancephysical properties as well as impurities
What types of materials are used resistors?
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
