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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.
What else can I help you with?
What is the largest value the resistor can be and still be in tolerance?
To determine the largest value a resistor can be while still being in tolerance, you need to know the resistor's nominal value and its tolerance percentage. For example, if a resistor has a nominal value of 100 ohms with a tolerance of 5%, the maximum allowable resistance would be 100 ohms + (5% of 100 ohms), which is 105 ohms. Thus, the largest value the resistor can be while remaining in tolerance is 105 ohms.
What do the first 3 bands on a resistor indicate?
The first 3 band on a resistor indicate the value of that resistor.
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).
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.
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 do the colours on resistor mean?
The colored bands on a resistor represent the resistor value and tolerance. The first two bands indicate the significant digits of the resistance value, the third band represents the multiplier, and the fourth band (if present) indicates the tolerance of the resistor. By decoding these colors, you can determine the resistance value of the resistor.
What is the largest value the resistor can be and still be in tolerance?
To determine the largest value a resistor can be while still being in tolerance, you need to know the resistor's nominal value and its tolerance percentage. For example, if a resistor has a nominal value of 100 ohms with a tolerance of 5%, the maximum allowable resistance would be 100 ohms + (5% of 100 ohms), which is 105 ohms. Thus, the largest value the resistor can be while remaining in tolerance is 105 ohms.
What value resistor will you need?
To determine the value of the resistor needed, you would typically need to know the voltage across the resistor and the desired current flowing through it. The value can be calculated using Ohm's Law: resistance (in ohms) = voltage (in volts) / current (in amperes).
Describe the purpose of the coloured bands on a resistor?
The colored bands on a resistor indicate its resistance value and tolerance. By interpreting the color code, you can determine the resistance value of the resistor and the range within which the actual resistance may vary. This helps in identifying, sorting, and using resistors in electronic circuits.
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.
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.
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.
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 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.
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 know if the resistor is defective?
To determine if a resistor is defective, you can measure its resistance using a multimeter. If the measured resistance significantly deviates from the resistor's specified value (indicated by its color code), it may be faulty. Additionally, visual inspection for physical damage, such as burns or cracks, can also indicate a defective resistor. If the resistor is part of a circuit and the circuit is not functioning properly, it may be worth testing the resistor as a potential cause.
