Electrical Engineering

It depends on the kind of business he or she wants to start. The first step is to create a business plan. You will need to decide what niche or specialty your business will occupy (why should people come to you, in other words); what kind of service you will provide; and who your target audience will be (what age group, for example). Once you know what kind of business you want to open and where there is a need for it, you can then begin to make the plan. You will need financing to start -- for example, if your business is in a store or an office, you will need money for rent; you will perhaps need to hire assistants; you will need to promote and publicize your business so that people will know about it and try it. These are all factors to consider even before you begin to have customers. Once you know what you want to do and where you want to do it, work with some people who are experienced with financing and with writing business plans. Having a good plan will give you the knowledge you need to help your new business to grow.

If two resistors of have same value but different in shape or cross sectional area, as you said so. Then the difference may be the length of the other resistor. In short, one resistors cross sectional area is wide and other is lenghty.

Overhead power lines are insulated from ground, typically using strings of glass or ceramic insulators. The wire itself is bare, though - it does not have insulation on it. There are many different types of overhead power line, but I'm not aware of any that actually have insulation.

Trace heating is a linear high resistive cable that emits heat under load and maintains a contant temperatur when fixed to water pipes/oil tank etc

it cant someone in marketing is lying

Regarding any electrical equipment, especially motors, 746 watts or volt-amps is 1 horsepower. If your table saw is rated 4 horsepower, that would be 2984 volt-amps and at 110 volts that calculates to 27 amps. The above answer is correct. At 110 volts you cannot run a 4 horsepower motor on a 15 amp circuit.

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The above theoretical answer is correct however you should allow extra for efficiency less than 100% and a power factor less than 1, so the current requirement should be increased by 25% to 34 amps.

<<>>The rule of thumb for motors at 240 v is 7 amps per HP, which would be 28 amps for 4 HP, but because the voltage is less the current must be more, 28x240/110 which is 61 amps.

KVA is an acronym for killo volt - amperes. It is a measure of power (both real and reactive) defined as P = Vrms * Irms. If there is a power factor associated with this, it can be used to separate the real and reactive power:
P(real) = Vrms * Irms * pf
P(reactive) = Vrms * Irms * (1 - pf)

My Understanding for stalling protection

When the motor is overloaded or the Stalling or locking the rotor overheat generated , due the presence the stalling protection operates.

I'm not sure I understand the question. If you are asking if it's single or 3 phase, this will be marked on the name plate.

To measure phase angle on a scope, connect the two inputs to the two sources, trigger off of one, and watch both. Measure the period of one and compare crossover difference with the other as a percentage of the period of the first, times 360 degrees.

Make sure the peak to peak offset for both inputs is equal, otherwise the crossover voltage won't be right.

Note that the period is 100% and is equivalent to 360 degrees. One way to make the calculation easier is to adjust the horizontal calibration so the first input has a period equal to 36 minor divisions - each division will equal 10 degrees in this case.

Also note, if you are comparing voltage and current, that your polarity is correct. This can be an issue if you are measuring across a small series resistor - the high side is voltage and the high to low side differential is current - but it is inverted.

The residual magnetisation present in the current transformer coils may cause the errors during measurement of high currents. So that it is necessary to check that.

Ohm's Law states that 'the current flowing along a conductor is directly proportional to the potential difference across the ends of that conductor, providing all physical conditions, such as temperature, remain constant'.

Unfortunately, Ohm's Law applies to very few conductors and, so, hardly qualifies as a 'law' at all!

If the overall load consists of:

'R' = resistance of each individual resistor

'S' = number of resistors in each series row

'P' = number of series rows connected in parallel,

then the effective overall DC resistance of the entire network is

[ R S / P ]

In a series circuit, the current does not change. It is simple the total voltage divided by the total impedence. However, in a parallel circuit the current splits. More current will go down the path with less impedence, and vice versa. For example, you have two parallel branches, 1 and 2, with resistances R1 and R2 respectively. Also, the total current flowing is I, while the current down each branch is I1 and I2.

I1= I(R2)/(R1+R2)

I2= I(R1)/(R1+R2)

Also note that I1 + I2 = I.

Electricity and water are often compared to help explain how electricity works.

Voltage is like the speed of water in a river, and electrical current is like the amount of water in the river. Resistance can be compared to the physical width of the river.

Power is voltage times current, or the speed of the water times the amount of water. Electricity is usually most dangerous when it is available at high power - similar to a huge, fast moving river.

side effects from leaking transformer oils in the early 1970's. Heart, kidney diseases?

Gate diffusion input is defined as the new technique of low power digital combination of circuit design. This allows reduced power consumption and delayed propagation.