### List 3 factors necessitate computer hardware maintenance Describe how these causes can be prevented?

### What causes 3-phase motors to heat up?

It is not only 3 phase motor, but every electrical device heats up. The reason is the current flowing through the windings causes the I^2*R heat loss. Apart from that, in case of an induction motor, the alternate cycle of magnetization and demagnetization of core material causes the hysterisis loss and eddy current loss. Last but not the least, there are friction and windage losses for a rotating electrical machine. All of these losses are…

### Harmonics in three phase why not in single phase?

Harmonics are the result of the current waveform being distorted by a non-linear load, such as a computer power supply or a motor control drive (VFD). In a commercial setting (which is usually 3-phase), harmonics cause unwanted current to flow which does no useful work, yet must be accounted for when sizing conductors, transformers, etc. Harmonics are certainly not limited to 3-phase systems, however. Any non-linear load, even single-phase, causes harmonics. Your computer, television, and…

### Characteristics of relevant information?

there are 4 characteristics of relevant information: 1) Relevance - how pertinent these particular facts are to situation at hand 2) Data Quality - degree to which data represent the true situation 3) Timeliness - data current enough to still be relevant 4) Completeness - having the right amount of information

### How have car loan rates changed over the last three months?

Due to the current economic situation in the United States lenders are raising interest rates, demanding higher downpayments, putting greater restrictions on zero percent financing, and implementing tougher credit requirements to get a loan. If the situation does not improve I will hate to see what the next 3 months brings.

### What causes resistance in a circuit?

Resistance :- Resistance of circuit is opposition offered to flow of current by that circuit. Causes: 1. it opposes the flow of current 2. it ipposes the voltage 3. it protect the electrical component. 4. it protect from any electrical hazards Not really, resistance is mostly centralised to one area of the circuit where the lower the resistance the lower the voltage but higher the amps. Resistance can be caused by many things such as…

### Two sentences with insight?

1)It was an interesting book, full of fascinating insights into human relationships.(clear understanding) 2)This overview gives full insight into the current situation of a country.(penetrating understanding, as of a complex situation or problem ). 3)My own mental insight informs me that three inevitable questions will be asked here by persons of inquiring minds.(Instinctive knowing)

### How do you find the prime factorization of 78?

starting with the first prime number (2), setting the result to 78 check if the current result is divisible by the current prime if it does not divide repeat from step 2 with the next prime number make a note of the prime number divide the current result by the current prime number and make the result the current result if current result is not 1 repeat from step 2 The list of primes noted…

### How are the 3 types of fault similar?

All the faults created by convention current Convention current creates heat and pressure. Magma gets hotter by the heat made by convention current .The pressure makes the magma to go up in to crusts and bursts out from a mountain. When magma gets hotter its moves the tectonic plates which cases a earthquake. When tectonic plates moves up and down under the sea that causes a tsunami.

### What is the current in star connection?

If a motor is connected in star, the current in the motor winding will be equivalent to the line current. If the motor is connected in delta, the current will be 1/sqrt(3) of the line current. If three phase CTs are connected in Delta, their secondary current will be sqrt(3) higher than the CT ratio implies by the line current.