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Why should power on self test happen when no terminals are connected?
Wiki User
∙ 16y ago
Power on self test in electronics equipment or computers is done to validate if all the critical parts of the device are working as desired when it is turned on. Any thing wrong internally or on an interface is typically reported as a failure on power on self test. What all is tested depends on how elaborately the power on self test has been designed.
- Neeraj Sharma
Wiki User
∙ 16y ago
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How do I connect a wall light switch that has 3 terminals the third being for the ground Which terminal should be connected to power coming from the breaker box?
How do I connect a wall light switch that has 3 terminals, the third being for the ground wire. Which terminal should be connected to power coming from the breaker box?
What is happen if real and reactive power is absent?
There is no load connected!
How the three phase rectification is achieved?
You achieve three phase rectification with a three phase rectifier. There is one in the alternator of you car. You have three windings, connected delta, so there are three terminals. Three diodes are connected to these terminals, anodes towards the terminals, cathodes common and connected to the battery. Three more diodes (for a total of six) are connected to the terminals, cathodes towards the terminals, with the anodes common and connected to ground. At any one moment of time, one winding provides voltage to cause two diodes to conduct, charging the battery. As the alternator rotates, the windings and the diodes take turns, effectively providing a three phase AC to DC power source to the battery. If you look closely, there is another set of three, smaller, diodes connected as well, anodes towards the terminals. These diodes provide power for the integrated regulator, but the six main diodes are large and heatsinked into the frame of the alternator.
What happens to charger if kept in power supply and not connected to phone?
Nothing should happen except for the loss of the time to charge your phone with it after a couple hours, you should unplug it.
How do i get the speaker on my 2002 Echo to start working?
Speakers generally work when they are connected to the radio and not shorted out. You can test the terminals with a multimeter to see if its getting power.
What will happen if the data cable or power cable are not connected or plug properly?
Then the component will not work or will be unreliable.
What if your 300zx turbo still on about 20 minute am later the car off?
that means power is still getting to the ignition coil. make sure that nothing is connected to the terminals on the coil.
How many wires to control a mechanically held contactor?
A contactor is a type of switch. However this switch uses electricity to power an electromagnetic coil to switch on or off power. Hence a contactor needs 2 wires - A live/hot wire and a neutral wire. Generally these are connected across the A1 and A2 terminals of the contactor.
What is the difference between a Delta-connected and a Y-connected transformer?
With three windings, you have six terminals. Call them A1, A2, B1, B2, C1, and C2, representing phase A, B, and C. In the delta configuration, A1 is connected to C2, C1 is connected to B2, and B1 is connected to A2. Power is from phase to phase - A1C2, C1B2, and B1A2. In the wye configuration, A2, B2, and C2 are connected together, and are usually connected to neutral. Power is from phase to neutral - A1, B1, and C1.
For what purpose do you short circuit the main and common terminal in a wattmeter?
A wattmeter has two coils: a current coil, which must be connected in series with a load, and a voltage coil, which must be connected in parallel with the supply voltage. Accordingly, a wattmeter has four terminals: two for each coil. One terminal of each coil needs to be connected to the line (as opposed to neutral) conductor and, so, these terminals are connected together. Having said that, this is not absolutely necessary, and the two coils can be connected quite separately. Basically, how the two coils are connected comes down to the configuration of the load whose power is being measured.
How can you tell if fuel pump relay is bad on 95 gmc safari?
In order to test the fuel pump relay, you must check that the two control circuit terminals on the relay are not connected, using an ohmmeter. You must also test the power circuit terminals on the relay, in the same way.
Which side capacitance is added to improve power factor?
From a technical point of view, it doesn't really matter, as long as it's in parallel with the load. In practise, there are different approaches. Individual loads can have capacitors connected across their terminals, or they can be connected at the point of entry of the supply.
