Electrical Engineering

I assume you mean "Why" rather than "What". Simply stated, there are fewer transmission losses using high voltage, so the large power lines run at high voltage, but for home use, high voltage would be dangerous and would require considerably more insulation, so it is stepped down to about 115V RMS (root mean square average) for home use. Fewer people get killed and fewer houses burn down that way.

A ceiling rose is the name given to an enclosed terminal block which enables a suspended lamp to be connected to a residence's permanent wiring. It also provides a means of gripping the flexible cable to support the weight of the light fitting.

The maximum allowable leakage current for any electrical device is 0.5 mA. This is equivalent to 0.5% of the rated current. This is a safety requirement to ensure that any current leakage is minimal and will not cause any harm to the user or damage to the device.

• Maximum allowable leakage current: 0.5 mA
• Equivalent to 0.5% of the rated current

It is important to adhere to the safety requirements to ensure the safety of users and the protection of the device.

18 or 9, depends...

There would be a significant decrease in the output of the generator. Depending on the type of generator, it could stop working altogether.

The armature has the stationary (not physically moving) magnetic field, which attracts the magnetic field in the rotor. Since DC does not alternate, a split ring is used to alternate the current (and resulting magnetic field), so that the rotor will spin.

the computer is what runs the car and all the engine functions, you can change the functions of the engine to get more power by buying a performance programmer and downloading the program into the cars computer.

theres your answer :)

On an electric bill, kVA stands for "kilovolt-ampere", which is a unit of apparent power. It measures the total electrical power, both real and reactive, that is consumed by a device or a facility.

It represents the maximum power that the electrical system can support and is used by utilities to determine the capacity requirements for supplying electricity to a customer. The actual power consumption in kilowatts (kW) is often lower than the apparent power in kVA due to the presence of reactive elements, such as inductive loads, which cause the power factor to be less than 1.

12 noon

The barrier potential is not a voltage created inside the diode. instead, it refers to the depleted zone around the juncture.

Since this region is deplete from carriers (electrons or holes), it became a virtual isolator. In order to make the depleted zone conductive, you need to apply an external voltage to the diode terminals.

If the voltage is in forward bias (+ to the anode and - to the cathode), you will need 0.2/0.3 V for germanium diodes and 0.6/07 V for silicon diodes. You need an external diode to keep the forward current with safe limits.

If the voltage is in reverse mode (- to the anode and + to the cathode), you will need to apply much more voltage to achieve conduction, although this could permanently damage the diode. Zenner diodes, for instance, always work in reverse bias to create a stable voltage, which is used for regulation purposes.

Measurements and research from various sources tell us that

-1mA is the sensibility threshold.

-5mA to 10mA hurts.

-40mA causes heart disturbance.

-60mA to 100mA is lethal.

These are reactions of a healthy human body. Much lower currents could be lethal for persons with heart malfunctions, pacemakers or other implanted electronic devices.

See related links for my source.

The resistance of human skin is highly variable depending on several different variables, but the two main variables are whether the skin is clean or dirty. Clean skin often has a resistance of about 500 ohms. Dirty skin can have electrical resistances of up to several million ohms.

Fixed-value resistors are normally manufactured so that they obey Ohm's Law -that is, the ratio of their voltage to current remains constant for variations in voltage, within specified limits. In other words, their resistance value remains constant for variations in voltage. This would produce a straight-line curve when plotted. Devices and materials that do not obey Ohm's Law (e.g. semiconductors, etc.) would produce a curved line.

1- low lube oil safety 2-water safety 3-temprechar safety any athar safety

Depends on how you add them. Added in series, the voltage will increase, maybe to the point of damaging the LED. If the LED survives, it will shine brighter.

Added in parallell, the LED will shine the same, and will be able to shine longer before draining the batteries.

A resistive load is one which does not power a motor. Examples of resistive loads would be light bulbs, toasters, stereo systems, televisions, hot plates and convection heaters. To calculate the wattage required to run these items, simply multiply input amps x volts for each individual item, then add those figures together to get the total wattage required. For example, 5 light bulbs at 60 watts each would be a total of 300 watts. If you want to add a 1500 watt hot plate, your total is now 1800 watts. Adding some music from a radio would add another 100 watts, and so on. • A reactive load is one that is usually associated with some type of electric motor. Examples of reactive loads would be circular saws, furnace motors, water pumps and air conditioners. This type of load may take three times the rated power requirement to start up and perform the required work. An example of this would be an air conditioner that runs on 20 amps at 120 volts. The running watts would be calculated.

One of the several uses of an RC coupled amplifier is to amplify the given input signal. It makes use of a sinusoidal input signal.

This is a crystal which, when squeezed, will generate a potential difference across opposite faces. A practical example is an inexpensive phonograph/gramophone pickup.

* resistance increases voltage. Adding more resistance to a circuit will alter the circuit pathway(s) and that change will force a change in voltage, current or both. Adding resistance will affect circuit voltage and current differently depending on whether that resistance is added in series or parallel. (In the question asked, it was not specified.) For a series circuit with one or more resistors, adding resistance in series will reduce total current and will reduce the voltage drop across each existing resistor. (Less current through a resistor means less voltage drop across it.) Total voltage in the circuit will remain the same. (The rule being that the total applied voltage is said to be dropped or felt across the circuit as a whole.) And the sum of the voltage drops in a series circuit is equal to the applied voltage, of course. If resistance is added in parallel to a circuit with one existing circuit resistor, total current in the circuit will increase, and the voltage across the added resistor will be the same as it for the one existing resistor and will be equal to the applied voltage. (The rule being that if only one resistor is in a circuit, hooking another resistor in parallel will have no effect on the voltage drop across or current flow through that single original resistor.) Hooking another resistor across one resistor in a series circuit that has two or more existing resistors will result in an increase in total current in the circuit, an increase in the voltage drop across the other resistors in the circuit, and a decrease in the voltage drop across the resistor across which the newly added resistor has been connected. The newly added resistor will, of course, have the same voltage drop as the resistor across which it is connected.

a step down transformer is used to lower the voltage from the powerlines into your home. a common slang term for this type of transformer is a pole pig.

Michael Faraday 1821

You will want to connect them in "parallel" (positive to positive, negative to negative). If you connect them in "series" (positive to negative) you will add one voltage to the other, making 24 volts.