Circuits

They will attract becuase oppsites attract. If something is positivley charge and the other this is negativley charged they will almost always attract. Hope I helped.

Usually a tiny fraction of a second. Actually it will depend on the characteristics of the the capacitor, and of the remaining circuit (mainly, any resistor in series). The "time constant" of a capacitor with a resistor in series to charge from 0 to a fraction of (1 - 1/e), about 68%, of its final value. This time is the product of the resistance and the capacitance. After about 5 time constant, you can consider the capacitor completely loaded for all practical purposes - i.e., it will be at the same voltage as the battery.

Yes. Any source of "Direct current" exists on the physics of electron flow at a constant charge or fixed polarity . A battery is essentially a can full of chemicals that produce electrons through the process of electrochemical reactions. The directional flow of these electrons, caused by the Chemical reactions, characterizes polarity. Depending on whichever ends of the circuit the poles of the battery are placed, the electrons or "charge" will always flow from Negative to Positive.

-- If all 8 batteries have the same rated voltage as the inverter input,

then they must be configured in parallel.

-- If the batteries are not rated the same voltage as the inverter input,

then some combination of series and parallel has to be designed. The

specific configuration depends on the details of the batteries you have.

If your torch has an incandescent bulb in it, the resistance of the wire in the bulb generates enough heat that light is created.

If your torch has an LED bulb, the PN junction in the diode creates light when the diode is forward-biased.

The battery with the larger mAh rating will last longer that the battery

with the smaller mAh number will last in the same application.

It's to help one of your best scorers exploit favorable matchups. It's best used when the defense you are playing uses man to man instead of a type of zone.

The 8086/8088 is the general purpose processor. The 8087 is the math co-processor for the 8086/8088.

Because the main purpose of a toaster is to radiate heat. In order to

generate heat from electric current, resistance is required in the circuit.

The leads of the voltmeter are labeled that way to get a positive readout when you connect the positive lead to the positive terminal of the battery (and negative to negative). Digital Voltmeters will read negative voltage if connected backwards. Voltmeters with a needle, would have the current flowing in such a way that the needle would try to deflect 'below zero' because the needle windings are designed for the current to flow in one direction, to cause positive deflection of the needle.

it would be possible if you were a genius like albert einstein

For interfacing to the microprocessor system, usually push buttons keys are used. Whenever a key is pressed, there are small mechanical vibrations that cause noise on the input, which can cause the microprocessor to detect several keypresses instead of just one. Bouncing happens because of the tendency of any two metal contacts in an electronic device to generate multiple signals as the contacts close or open. You can solve this problem using software or hardware debouncing.

The hardware approach is shown in figure 8.1. It uses a cross-coupled latch formed with two Nand gates

Simple Keyboard Interface:

The figure 8.3 shows the simple keyboard interface

Manipal University Page No.: 195

When port pin is logic 1,key is open,otherwise key is closed. The software routine to get key code with key debounce is:

In the technique shown in figure 8.3, each key requires separate interface.This means, to interface one key,one input line is required.This is the disdavantage as it requires many line as many keys. This number of lines required can be reduced if keys are put in matrix form.

The figure 8.4 shows the interface of matrix key board

The 16 keys are arranged in four rows and four columns. The connection will be made such that when a key is pressed, it shotrs the corresponding

one row and one column. Two ports are required, input port for connecting rows and and output port for connecting columns. The lines connected to rows are called returned lines and the lines connected to columns are called scan lines

When all a key is pressed it shorts the corresponding row and column. If the output line of this colummn is low, then it makes the corresponding row line low,other wise the status of row line will be high. The pressed key will be identified by the data sent on the oputput port and the input code received from the input port. Figure 8.6 shows the flow chart for interfacing of 8086

As shown in the figure 8.7, the interfacing is done using 8255 PPI. The 8086 is being used in maximum mode and port A of 8255 is used for columns and port B for rows. By making use of the lookup table stored in the memory, the 8086 microprocessor will determine the code of the depressed key, then it will initiate the action. The figure 8.8 shows the flow chart for keyboard interface............

Any sort of dry battery will do this, you just need to match the required bulb voltage with the battery voltage. Most small dry batteries give 1.5 volts, the square shaped ones give 9 volts, and there are bigger ones used for lanterns and large flashlights. The bulb should have on it the required voltage, if it is say 3 volts you will need two batteries in series (connect them positive end to negative end of the second) or you can make a string in series, you just get number of batteries x 1.5 volts. If it is a car bulb these operate at 12 volts, you will need a car type battery for these.

Simply connect the wire between the two terminals of the battery.

The wire will get plenty hot, and probably even shine like a toaster,

but probably not for long.

i will tell you how if you tell me what this project is called,it uses light bulb, copper wires,holder,6 volt battery.

A device that provides both mechanical support for and electrical contacts to a battery. In general there is no schematic circuit symbol for a battery holder, as the symbol for a battery tends to imply a battery holder is also present.

The circuit stops working because of the short circuit

When two different metals are pushed into a potato a voltage can be measured across the metals. The same is true for many fruits and vegetables. The reason is that chemicals, normally acids, in the fruits or vegetables react with the metals and generate a voltage. Good metals to try are copper and brass but others are worth using as well. The chemical compositions vary and so does the voltage. Potatoes are known to give a higher voltage than many others. For those who have the inclination, try various metals and fruits to find the highest voltage. It is this same principle on which batteries are based. Unfortunately, fruit is not quite as good as a purpose made battery so don't expect to be running any high power devices from a lemon when you try it.

If the resistance (R) remains constant the power P (i.e. rate of energy release) is proportional to the square of the current (I) P = R*I^2. So tripling the current will result in a nine-fold increase in power (d).

The more "plates" in the grid, the more surface area exposed to the electrolyte, hence the more power produced.

Nothing happens at all, unless there is a complete conducting path

back to the battery's positive side. Once you have that, current will

flow, and the light bulb may light up.

If a battery is "shorted", meaning that its terminals are connected together

through a low resistance, high current flows in the connection and the battery

becomes discharged very soon. It makes no difference whether any part of the

battery is connected to ground.

A 6v motor might not run at all on a 4.5v battery. Whether or not it does, it's likely

to discharge the battery rather rapidly. A series resistor will help the battery last

longer, but will make it even less likely that the motor will run at all. You're better

off taking some time to find either a 4.5v motor or a 6v battery.