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What else can I help you with?
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
If two resistors of equal value are connected in parallel with each other. The power dissipated by the two resistors will be equal to the sum of the power dissipated by each resistor true or false?
True. When two resistors of equal value are connected in parallel, the total power dissipated by the circuit is indeed the sum of the power dissipated by each resistor. Since they have the same resistance and are subjected to the same voltage, each resistor will dissipate the same amount of power, and their combined power will equal twice that of one resistor.
Can you make ct by putting low value shunt resistor across pt?
Yes, you can create a current transformer (CT) effect by placing a low-value shunt resistor across a load or a power source. When current flows through the shunt resistor, it generates a voltage proportional to the current, allowing you to measure the current indirectly. However, this method is typically used for low-current applications, as the shunt resistor can introduce power loss and affect the circuit's performance if not properly managed. For higher currents, a dedicated current transformer is generally preferred for efficiency and accuracy.
What is a 4k7 resistor?
A 4k7 resistor is a resistor with a resistance value of 4.7 kilohms, or 4,700 ohms. The "4k7" notation is a shorthand used in electronics, where the "k" stands for kilo (1,000), and the "7" indicates the additional 0.7 kilohms. This type of resistor is commonly used in various electronic circuits for current limiting, voltage division, and signal processing applications. Resistors like the 4k7 are available in different power ratings and tolerance levels, depending on the specific requirements of the circuit.
What do the first 3 bands on a resistor indicate?
The first 3 band on a resistor indicate the value of that resistor.
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.
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 does 1 4W and 1 8W means for resistors and do they affect the value of the resistor?
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.
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
Why resistor size does not varies with its value?
A: A resistor size is determined by the usage or its power dissipation. the bigger the size the more power it can dissipate due to the extra surface. SIZE is a function of power dissipation and has nothing to do with its value
How do you fix the value of a resistor?
It depends on what is wrong with the resistor. If it is damaged, replace it with the same type, value and power rating. If it is the wrong value and is not damaged, you can increase the value by placing another in series or reduce the value by placing another in parallel. If the resistor is variable type, you should be able to adjust it.
If two resistors of equal value are connected in parallel with each other. The power dissipated by the two resistors will be equal to the sum of the power dissipated by each resistor true or false?
True. When two resistors of equal value are connected in parallel, the total power dissipated by the circuit is indeed the sum of the power dissipated by each resistor. Since they have the same resistance and are subjected to the same voltage, each resistor will dissipate the same amount of power, and their combined power will equal twice that of one resistor.
Does a Resistor have a different resistance when connected to a power source vs if the resistance is tested when the resistor is out of circuit?
No, the resistance of a resistor remains the same whether it is connected to a power source or tested out of circuit. The resistance value is an intrinsic property of the resistor and does not change based on the external conditions.
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).
Can you make ct by putting low value shunt resistor across pt?
Yes, you can create a current transformer (CT) effect by placing a low-value shunt resistor across a load or a power source. When current flows through the shunt resistor, it generates a voltage proportional to the current, allowing you to measure the current indirectly. However, this method is typically used for low-current applications, as the shunt resistor can introduce power loss and affect the circuit's performance if not properly managed. For higher currents, a dedicated current transformer is generally preferred for efficiency and accuracy.
What is the current flowing through a 200 watt resistor that has a rating of 21 ohms?
The current can't be calculated from the information given in the question.The power rating of a resistor is the maximum power it can dissipate before it overheatsand its resistance possibly changes permanently. The power rating is not the amount ofpower it always dissipates.So, all we really know about the resistor in the question is that its resistance is 21 ohms.And all we can say about the current through it is:Current through the resistor = (voltage between the ends of the resistor) divided by (21).
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.
