To find out, we need to be able to calculate the amount of power that the resistor will dissipate. If a current I flows through through a given element in your circuit, losing voltage V in the process, then the power dissipated by that circuit element is the product of that current and...
An uninterruptible power supply is something you might not think about until you really need it. MF3d / Getty Images It's a foundational element of device integrity, but you wouldn't be the first person to beg the question, "What is a UPS?" In short, a UPS safeguards electronic device...
Step 1: Double Confirm the Resistance of the Resistor Even thought the value of the resistance is printed, you still need to confirm whether the actual resistance is the same as shown. Most resistor has 10% tolerance in their actual value, but it still depends on the type of resistor you ...
So we need a resistor with a power rating of at least 140 mW. But preferably more. A rule of thumb is to find a resistor with twice the power rating. Here I would choose a 250 mW resistor since those are the most standard ones. Usually, you can just use the cheapest resistor you ...
The power rating of the resistor is normally important only for the dc load termination. The other configurations do not result in continuous power dissipation (except for high pulse rates, above 1kPPS, where the power increases with increasing frequency, up to the same value as for dc load ...
How to calculate Resistance using colour code? The colour bands on the resistor are used to identify the value and tolerance or resistance. Thepowerrating of the resistor depends upon the physical size of the resistor. We consider as, a resistor consists of four different color bands (A, B,...
Because reed relays are so susceptible to contact damage, inrush currents from system capacitance can be particularly dangerous. Inrush currents can be controlled with a series impedance, such as a resistor or ferrite, between the relay and the capacitance. Any capacitance in the system can contri...
When the voltage is at a certain level, the makeup of the gas is such that it is a poor conductor. When the voltage surges above that level, the electrical power is strong enough toionize the gas, making it a very effective conductor. It passes on current to the ground line until the...
The first factor is to have a value that isnot too small. If the value is too small a lot of current will flow through the resistor, which makes it really warm and could break it. What is “too small”? Standard resistors often have a power rating of 0.25W (Watt). ...
When the voltage is at a certain level, the makeup of the gas is such that it is a poor conductor. When the voltage surges above that level, the electrical power is strong enough toionize the gas, making it a very effective conductor. It passes on current to the ground line until the...