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What does 1 4W and 1 8W means for resistors and do they affect the value of the resistor?
Wiki User
∙ 10y ago
It means the maximum power each one is capable of dissipating.
The power dissipated by a resistor is (current through it)2 x (its resistance). If you
exceed the power rating of a resistor, it will overheat, and that always increases its
resistace value, at least for as long as it remains hot. If you take it to the extreme,
the resistor can melt, smoke, crack, explode, etc.
The power rating of a resistor has no direct effect on its resistance value.
Wiki User
∙ 10y ago
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What does minimum value means?
It means the smallest value.
What a variable means to decrease its value?
A variable means to decrease it's value by something%
How does a change in the value of an input variable affect the value of an output variable?
The change in the input value is equalto the change in the output value.
Does the value of m affect the location of the y-interception?
Yes
Which of measure of location is affect most by extreme value?
median
Difference between variable and fixed resistor?
Variable resistors means that a resistor which can change its resistance by control by any person or it self and fixed resistor means that it can not change its value.
How do manufacturers of resistors indicate the value of the resistance?
They use a color code. Colored bands on the resistor that tell the value. Some precision resistors have their value written on them.
How calculated the value of resistor that is to be used in particular circuit?
To read the value of a resistor: Resistors are color coded, you can use the chart found below And how accurate the values of resistors are is their tolerance, also found in the chart
What is the value of 1E5 resistor?
According to the EIA-96 system which applies to SMD resistors, it means 10K (10,000 ohm), 5% tolerance.
What are the main condition for resistors in parallel?
Two resistors wired in parallel means that both resistors are soldered together to equal the value of a smaller resistor value. Both resistors will be connected to the same line on the circuit board and then both will terminate on the same final line they are assigned to. Thus, a pair of 100k ohm resistors can take the place of one 50k ohm.
Decade resistor box?
A variable range of resistors built inside a box that can be varied as per our convenient. For example a set of kilo ohm resistors will be there,if u want 3 kilo ohm resistor then using the knob u can change the resistor value to your desired value. similarly there will be another set of resistors in mega ohm etc
What does 1-4W and 1-8W means for resistors and do they affect the value of the resistor?
I think you mean 1/4W and 1/8W ratings for resistors. If so, it indicates wattage (power dissipation) ratings for resistors. Basically this specification for resistors shows maximum power that can be allowed to dissipate in the resistor. Wattage does not as such affect the value of resistor (it should remain with in % tolerance value specified when operated within specified wattage). ( P=I^2 x R). or (P = I x V) P=Power, I = Current, R= Resistance, V = Voltage Once you know the power rating, you can calcutate how much current can be passed through a resistor of specific value without causing a damage to the component or circuit. For long term reliability always it is advisable to design with a margin (for 1/4W or 250mW e.g. design so that it is always certain % less than the rated e.g. operate at 200mW or less) - Neeraj Sharma
Did the the total voltage across the resistors does not depend on the resistor value?
It depends on where and how the resistor is placed in a circuit. A string of series resistors will split the voltage across all them depending on their values. All of the resistors in parallel will have the same voltage across all of them no matter what their resistance is.
What is precision resistor?
A precision resistor is a resistor that has an actual value that is very close (or precise) to its nominal (or stated value). Therefore, precision resistors have a very degree of accuracy of being very close to their nominal values.
2 resistors unequal value are in parallel. Would the power dissipated by the resistor with larger ohmic value be greater than the power dissipated by the resistor of lesser value?
No, because the power dissipated in a resistor is proportional to the square of the current through the resistor but only directly proportional to the resistance of the resistor (I^2 * R) and the current through the lower value resistor will be higher than the current through the higher value resistor, the lower value resistor will usually dissipate more power.
What do the bands on resistors mean?
in simple terms, band represent numbers, ex:- 10K resistor have different colour code and that is difference from 5k resistor. if you type in google 'resistor colour code' that will describe how to calculate a resistor value. thanks
How does electricity react to resistances in parallel and in series?
Resistances in series act just as if they were one single resistor. The value of the single resistor is the sum of the individual resistors connected in series ... Ra + Rb + Rc etc. When several resistors are in series, the effective total is greater than the biggest one. Resistance in parallel act just as if they were one single resistor. The reciprocal of the value of the single resistor is the sum of the reciprocals of the individual resistors connected in parallel ... Total effective resistance = 1 divided by (1/Ra + 1/Rb + 1/Rc + etc.) When several resistors are in parallel, the effective total is less than the smallest one. Once you figure out the effective value of the series- or parallel-combination of many resistors, you handle them as if they were one single resistor, and you can work with the voltage and current: Current through any resistance = (Voltage across it) divided by (its resistance).
