0
Why it is advisable to remove the source and complete the circuit by internal resistance or by a link instead of short circuiting the terminals of the supply?
Because many electronics, like power supplies, have internal energy storage in the form of capacitors. If you were to short the terminals, you would be shorting out the internal capacitors and thus creating a potentially hazardous situation. "Completing the circuit by internal resistance" allows the energy stored in the internal capacitors to bleed off slowly because the internal resistance is larger than a short.
What else can I help you with?
How does a torch work for kids?
In a torch (flashlight), the current passes from the positive terminal, through the bulb, and returns back in the negative terminals, making a complete circuit. When the switch is moved to the on position, a metal piece inside the case touches the positive terminals of the battery, the circuit is completed, and the torch turns on. Move the switch to the off position, the metal piece no longer touches the positive terminals of the battery, and the torch turns off.
Why will the bulb not light up in a short circuit?
That's because the path of the short circuit provides a much lower resistance than the actual path and which the current will choose to flow through the path with a lower resistance rather than the path connected to a bulb,which explains that why the bulb won't light up.
What is CT burden in electrical engineering?
CT (current transformer) Burden is the maximum load that the CT secondary can drive (e.g. meters or protection relays) Why do you care about burden when ordering current transformers? The burden is the termination impedance of the measuring instrument. The measuring instrument can be an analog or digital energy meter, a data logger or a recorder. All instruments that use a current transformer to measure line current must terminate the CT with a resistance (impedance in same case which means there is some inductance involved). A CT supplier should be given the burden when ordering. Technically, the total burden for a CT is the internal winding resistance, the connecting lead resistance and the measuring instrument input resistance. Some Ct's are installed a long distance from the measuring instrument and the connecting leads can have a resistance as much as 0.002 ohms per foot (both ways because the current makes a complete round trip). This resistance will cause an error if not taken into account.
What term is a measurement of resistance in an electrical circuit?
The technical definition is "Electrical resistance is a ratio of the degree to which an object opposes an electric current through it, measured in ohms." In simplfied terms, electrical resistance is broadly equivalent to friction in a mechanical system. If you applied a voltage to a circuit with zero resistance then you would get an infinite current. In reality all circuits have some resistance which limits the current. We can predict the current in a given circuit using Ohms law: V = I x R Where: V is Voltage (measured in Volts) I is current (measured in Amps) R is resistance (measured in Ohms)
What is the difference between EMF and terminal PD?
An electromotive force is the potential differenceappearing across the terminals of a battery, generator, etc., when that device is not supplying any load. When the device is supplying a load current, the electromotive force is equal to the sum of the voltage drops around the complete circuit, including any internal voltage drop.A potential difference (also known as a 'voltage'), as the name implies, is the difference in potential between two points.
What if there is joint in the copper strip which connects the air terminals to the ground earthing pit?
Nothing wrong as long as the joint does not increase the over all resistance and does not become vulnerable for breakage. Joint has to complete and perfect.
How do you test a tps on a 1990 miata?
The TPS on a 1990 is a WOT switch. Using a multimeter set to read resistance, or a continuity tester, check the resistance between the center and bottom terminals of your TPS with engine off and throttle closed completely. You should read continuity (or zero ohms) between those two terminals, and if you manually open the throttle slightly, the continuity should be lost (resistance goes to infinity). A complete test takes more time; the manual states that with a 0.016" feeler gauge between the throttle lever and the throttle stop screw, you should read continuity, which should go away if you put a 0.027" gauge in there. With the throttle fully open ("WOT"), there should be continuity between the top two terminals of the TPS. In between the idle and WOT positions, there should be no continuity between any of the terminals
Why an independent voltage source is made deactivated by shortening and an independent current source is made deactivated by open circuiting?
Short-circuiting an independent voltage source effectively sets its voltage to zero, deactivating it. Since current in a short circuit is maximized, this creates a situation where the voltage source cannot maintain its specified voltage. Open circuiting an independent current source prevents the flow of current, effectively deactivating it because without a complete path for current to flow, the current source cannot maintain its specified current output.
Why do bulbs have two terminals?
One Terminal Is for Positive And Another Is Negative Wier . Bulb Can't Glow Until Both The Terminals Are Connected
How can a potentiometer be a rheostat?
A rheostat and a potentiometer are two different applications for the same device, a variable resistor. These devices have three terminals. Two terminals are connected across the complete resistor, while the third terminal is connected to a controllable wiper. The variable resistance is provided between the wiper terminal and either one of the other two terminals.When used to control current, it is called a rheostat. When used to control voltage, it is called a potentiometer.
What does a complete electric circuit have?
a power source, path, and load or resistance.
Does resistance 2 on playstation 3 have trophy points?
Yes, Resistance 2 supports trophies. A complete list can be found at http://www.ps3trophies.org/game/resistance-2/trophies/
What are the benfits of resistance training?
all athletes, regardless of the sport or event in which they complete
What complete path is formed when a wire connected to both terminals of an electrical source?
When a wire is connected to both terminals of an electrical source, a complete path for electric current is formed. The current flows from the positive terminal of the source, through the wire, and back to the negative terminal, completing the circuit. This flow of electrons allows electrical devices to function properly.
What is resistance when lifting weight?
Resistance is the amount of contrary force against which your muscles must work in order to complete a movement. Most often, these are the weights being lifted or resistance bands being stretched.
What is the prognosis for mild asymptomatic insulin resistance?
In mild asymptomatic insulin resistance, proper treatment may lead to a complete reversal, with normalization of blood sugar.
How is the voltage drop across each resistance of series combination related to the correspoding resistance?
The voltage across each series component is proportional to its resistance, and their sum is equal to the voltage between the ends of the complete series string.
