Standard resistors are very high precision resistors used as a reference to calibrate or verify the accuracy of other resistors in industry or establishments, on lines or production equipment. these are also used to check the accuracy of resistance meters by most manufacturers.
Also What is the minimum value of resistor?
The lowest possible value is 423 K. The total range of possible resistances is almost 100K. The fourth resistor’s nominal value is 680 K. Performing the same process with tolerances, we find that the highest possible value is 714 K while the lowest possible value is 646 K.
Subsequently, What are the 4 types of resistors?
Different Types of Resistors – Fixed, Variable, Linear and Non-Linear Resistors & Applications
- Carbon Composition Resistors.
- Wire wound Resistors.
- Thin Film Resistors.
- Carbon Film Resistors.
- Metal Film Resistors.
- Thick Film Resistors.
- Metal Oxide Resistors.
- Cermet Oxide Resistors (Network Resistors)
What is a standard resistor made of? The standard resistor is made from manganin because the variation of resistivity with temperature is very small. Temperature coefficient of resistance is less and the resistivity of manganin is very high.
Which material is used for standard resistor?
The alloys ,example manganin , constantanor, and nichrome are the materials used for making a standard resistor.It is reason the alloys are used for this purpose for the reason that they posses high resistivity and low temperature coefficient of resist.
How do you find the minimum value of a resistor?
Take the nominal value and multiply it by 1 + your tolerance, which is (1+0.1). Then take the nominal value and multiply it by 1 – tolerance, or (1-0.1). The highest possible value is 517 K.
What is the minimum resistance which?
The minimum resistance which can be made using five resistors is 0.04 ohms. Explanation: In parallel combination of resistors, the equivalent resistance is minimum.
What is the maximum tolerance of the resistor?
Resistance tolerance shows the maximum allowable difference from the nominal resistance value. Most of the resistors Bourns offers are ±1 % and ±5 % tolerance. Precision thin film resistors have a very low tolerance down to ±0.01 %.
What are different types of resistors?
Types of Resistors
- Fixed Value Resistors. These are the predominant type of resistor configuration, and as the name suggests, they have a fixed resistance value. …
- Variable Resistors. …
- Resistor Networks. …
- Carbon Film Resistors. …
- Metal Film Resistors. …
- Wirewound Resistors. …
- Metal Oxide Resistors. …
- Metal Strip Resistors.
What are the different types of resistance?
The types of resistors include:
- Carbon Composition Resistor.
- Thermistor.
- Wire Wound Resistor.
- Metal Film Resistor.
- Carbon Film Resistor.
- Variable Resistor.
- Varistor
- Light Dependent Resistor.
How many types of resistors are there what are they?
All modern fixed value resistors can be classified into four broad groups: Carbon Composition Resistor – Made of carbon dust or graphite paste, low wattage values. Film or Cermet Resistor – Made from conductive metal oxide paste, very low wattage values.
Why resistors are made up of alloys?
Alloys are used for making standard resistance coil because they have low temperature coefficient of resistance with less temperature sensitivity. This keeps the resistance of the wire almost constant even in small temperature change.
Why is manganin used for making standard resistors?
2 Answers. The temperature co-efficient of resistance of manganin is very low. Hence its resistance almost independent of temperature. Hence it is used in making standard resistances.
What are potentiometers made of?
The resistive element of inexpensive potentiometers is often made of graphite. Other materials used include resistance wire, carbon particles in plastic, and a ceramic/metal mixture called cermet.
What material is preferred to make standard resistors give examples?
Alloys like manganin and constantan are used for making standard resistance coils as they have high resistivity, low-temperature coefficient of resistance. Therefore, these alloys are used for making wire-bound standard resistors.
Which material is used for making the wires of standard resistance give reason?
Constantan is used for making standard resistances. The reason is that its resistance remains almost unaffected with change in temperature.
Why alloys are used for making standard resistors?
Alloys are used for making standard resistance coil because they have low temperature coefficient of resistance with less temperature sensitivity. … The alloys also have high resistivity and hence high resistance, because for given length and cross-section area of conductor (L and A are constant).
How do you find the maximum and minimum current?
Use V/R to get I, and min I = V/ max R.
What is the minimum value of a 220 ohm resistor with a 10 tolerance?
Tolerance Band
For example: A 220 Ω resistor has a silver tolerance band. Tolerance = value of resistor x value of tolerance band = 220 Ω x 10% = 22 Ω
What is the maximum and minimum resistance can be obtained using this system?
Maximum and minimum resistance is 9 and 1 ohm respectively.
We know, equivalent resistance is maximum when all resistance are in series. Therefore, maximum resistance , Also, equivalent resistance is minimum when all resistance are in parallel.
What is the minimum resistance which can be made using five resistors of 1/5 ohm each?
What is the minimum resistance which can be made using five resistors each of (1//5) Omega ? Minimum resistance is obtained in parallel combination. Thus, Rp=(1/5Ω)5=(1/25)Ω.
What is the minimum resistance which can be made using four resistors each of resistance 1/2 Ω?
Answer Expert Verified
R 1 = R 2 = R 3 = R4 = R= 20 Ω
What is the minimum resistance which can be made using five resistors each of 1 2 ohm *?
So, from the above explanation it is concluded that if we connect all the five resistors in parallel then the minimum resistor of 125 Ω can be made. Hence, the correct answer is 125 Ω and the correct option is B.