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Carefully scrap the insulating material off along a straight line on the resistor body using a pen knife until you can see the spiral track of the resistive material.
Chances are you can still measure some resistance, using either end of the connection lead and a pointed pin, pricking at the spiral track.
Starts from one end and advance on each spiral track until you have found an open circuit. Record the resistance before this happens. Do the other end using the same method.
Add the resistance found in both cases and adds 10% more. This will give you the approximate resistance of the original resistor.
This method often works because resistor burns open in one spot only.
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What do the first 3 bands on a resistor indicate?
The first 3 band on a resistor indicate the value of that resistor.
When Resister is 120 volts and the current through the resister is 0.5 Amps determine the value of the resistor in ohms?
Using Ohms Law, the answer is 120/0.5 = 240 Ohms.
Is it true that the higher a resistance value the higher the voltage drop?
Greater value resistor will absorb more voltage than smaller value. The more voltage absorb with same value current flow, the larger body mass resistor will require. Body size depends on type of resistor (material resistor is made of).
If there is a potential difference of 12 V across a resistor with 0.25 A current in it the resistance if the resistor is?
Resistance (Ohms) = Potential Difference (Volts) / Current (Amps) So, 12/0.25 = 48 Ohms.
What happen to the phase angle if the value of capacitor is fixed and the value of resistor is changed?
The phase angle will either go up or down as well, depending on the new value of the resistor.
Why do we put a resistor in series with an LED?
A correctly rated resistor will prevent that the LED is not burnt out if it receives too much power.
What are resistor values defined by?
Resistor value is defined by the Resistance the resistor offers in Kilo ohms/ohms value given by color codes on the resistor.
How Determine the power dissipated by the resistor?
Power dissipated by the resistor = I^2 * R or V^2 / R, where R = its resistance value, I = the current in the resistor, and V = the voltage drop across the two terminals of the resistor. You need to measure or find the information of either I (using an ammeter) or V (a voltmeter).
What is a resistor whose value can varied over a range of value called?
Variable resistor. The value of the variable resistor can be changed at any given moment.
What are the three methods to determine the value of a resistor?
Basically you can either read the resistance that is printed on the resistor (with a special color code, which you would have to learn), or you can use Ohm's Law, by measuring a voltage through the resistor and the corresponding current. I am not aware of any third method.
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 is the relation between the size of the resistor and its value?
There is no relation between the resistor's ohms value and its size. The power of the resistor can be seen by its size. If the power is too small, the resistor can be destroyed.
How do you measure burned out resistor value?
A: You may find some traces of the color code bands if not there is not way to determine its value with a VOM the carbon residue will falsely deviate the value . Cleaning with it with a alcohol will help but to be certain there is no way
What do the first 3 bands on a resistor indicate?
The first 3 band on a resistor indicate the value of that resistor.
Why resistor should disconnected from the circuit when measured the value of resistor?
if not disconnected you will measure the resistance of the circuit in parallel with the resistor.
What do the colours on resistor mean?
It's a code to tell you the value of the resistance of the resistor.
How do you determine the 10k resistor?
A 10K resistor has the coloured stripes in the following order.. Brown, Black, Orange, Gold
