Electronics Engineering

good question - Understand a nerve ok - I like to use an old Oak Tree for example that has no dead leaves - Now the Tree has many branches like a nerve

Now we pluck this tree from the earth and hold it upside down - follow me - and we suspend it upon another old oak tree with no leaves on the earth. So The big Old Oak Tree above is upside down with it's many branches and the other oak tree is on the Ground - the Two trees almost touch but don't - cause of the wind and the atmosphere perhaps even the fog - Now you see the Dendrites and The Nervous System withing the Great Cerebral Commisure - the synapse will be the fog and the humidity on our little jest or journey in time depends on our chemical balance within our synapse that is the wind between the tree

As more light bulbs are added in a series circuit, the effective resistance of the circuit increases. That causes the current leaving the source to decrease.

The expression for the current (I) is simply the voltage (V) divided by the total impedance (Z).

In your example its (40+j25) V divided by (R + / - j) Ohms.

We aren't given the dc resistance of the inductor so assuming it is zero.

Resistance of resistor is 20 Ohms.

Reactance of inductor is 2 * Pi * Freq * Inductor value in Henries. gives

2*3.14*79.5*0.6 = 299.7 Ohms.

So total impedance Z is (20+j299.6) Ohms....say (20+j300) Ohms

Now Complex series current I = V/Z = (40+j25) V / (20+j300) Ohms

Rather than taking surds we simplify to polar form here.

V = (40+j25) = 47.17 Volts at phase angle 32 degrees

Z = (20+j300) = 300.7 Ohms at phase angle 86.2 degrees

So current is 47.17 V /300.7 Ohms and phase angle is (32 degrees - 86.2 degrees)

I = 0.157 Amps at angle -54.2 degrees

Changing this to rectangular form gives (0.092 -j0.127) Amps

Scaler. Its vector counterpart is the electric field.

Capacity to the equivalent of the battery is reduced - that is, you'll run out of charge quicker but the voltage delivered will still be the same.

I wouldn't t reccomend twice the voltage but dc motors can run at 150% rated voltage for up to a minute with no adverse effects. That being said it shouldn't be a regular practice and it will definately need to cool off under less load between bursts. Typical use of this application would be in an electric vehicle more like a bicycle or a go kart.

The second one should roughly last twice as long as the first one.

You can't really say how long as it depends what you are using the computer for, but whatever you are doing the second one will always last about twice as long.

Since a short circuit is, essentially, a zero impedance connection between nodes, the current in a short circuit is limited only by the ability of the source.

In the case of an ideal voltage source connected to an ideal short circuit, you would have infinite amperes.

Electricity and Electronics Engineer

in case of inductor or capacitor power factor is always zero.as power factor is cosine of phase angle between voltage and current. in case of inductor and capacitor phase angle between voltage and current is 90 so it become zero so if given power factor is zero then it can be inductor or capacitor.

shut up , if u ask that it is just weird : ( Kreep !

1

Depending upon the cell itself, it could be as simple as two dots on the back of the cell, which is the non-blue side. On other cells, it could be the white vertical lines on the front = negative and the dots on the back = positive.

No.

A: actually any active components will oscillate with positive feedback

A transistor can be used as an amplifier along with an LC tank circuit to form an oscillator; it is an active device (as LIBURNO states) which will amplify the feedback signal coming out of the LC tank circuit. The tank circuit has a natural resonant frequency, meaning the L and C together will try to generate a specific frequency; this is then fed back into the input of the transistor amplifier, and the output is fed to the LC tank circuit exacerbating this oscillation until it reaches its' maximum level.

An inverting amplifier can be used similarly; the output is fed to the input; this will cause the output to change as fast as the amplifier can. The frequency of this design is much harder to control, but potentially higher. Also, without the LC tank, the output voltage will remain lower.

V = I x R so current I = 1/2 amp. I bet the bulb is rated at 60 W because Watts = Current x Voltage.

Where V = voltage (volt)

I = current (ampere)

R = resistance (ohm)

Your question isn't easy to answer. A lamp has two 'resistances': a 'cold' resistance, and a 'hot' resistance. Before it is energised, it is cold, so its resistance is low; when it is energised, it becomes very hot, and its resistance increases significantly. So, the question is whether your '240 ohms' is the cold resistance or the hot resistance. If it is the cold resistance, then a current of 0.5 A will flow through it for a fraction of a second, then its resistance will increase significantly, and the current will fall to a very much smaller value.

An article for a magazine that is meant to tell people about how products are sold to different countries

Logic gates are in fact the building block of digital electronics; they are formed by the combination of transistors (either BJT or MOSFET) to realize some digital operations (like logical OR, AND, INVERT ). Every digital product, like computers, mobile, calculators even digital watches, contain logic gates. The use of logic gates in digital world can be understood better by the following example: the single bit full adder in digital electronics is a logic circuit which perform the logical addition of two single bit binary numbers (a,b,cin) a and b are the the two binary number of single digit (either 1 or 0) and cin is the carry input . say for example a,b,cin= 1,1,1 gave an logical sum output of 1 and a carry of 1 , a,b,cin= 110 gave sum= 0 and carry of 1. Now this adder can be formed by the combination of many gate like by using NAND gates only. or by using XOR , AND ,OR gates and so on. So, in a nutshell, the adder which is of great importance in your computer processor and also in many more applications is basically built from the logic gates.

Doppler radar is used to measure speed, not temperature.

That depends on the exact circumstances. For example, in electrical circuits, power = I2R. However, since the current, in turn, depends on the voltage and the resistance, it is better to express this as V2/R. For mechanical energy, power is basically speed times force.

The difference between a conductor and a insulator is that a conductor tries to keep the warmness away and the insulator tries to keep the warmness in. An insulator is like an refrigerator, and mabey a cooler so when you go hiking it keeps the coolness inside or keeps the warmness inside!!:-)<3

1. either field effect (JFET, MOSFET) or junction (BJT) or point contact (usually considered obsolete)
2. either small signal or high power
3. either electron majority carrier (N-channel FET, NPN BJT) or hole majority carrier (P-channel FET, PNP BJT)
4. either linear (used in amplifier and oscillator circuits) or switching (used in digital logic circuits)
5. etc.

You do not build a series circuit in your home. The only series circuits are the circuits that go through circuit breakers, light switches, and relays. Electrical and electronic devices use internal series circuits but those are the only ones people build. No one builds series circuits for house wiring. Electrical outlets are connected with parallel wiring.

If they're connected one at a time ... first one and then the other ... then each one has 120 volts
across it while it's connected to the supply.

If they're connected across the supply at the same time in parallel, then of course they have the
same voltage across them, because their ends are common.

If they're connected across the supply in series, then the voltage across the 50-ohm load is 40 volts,
and the voltage across the 100-ohm load is 80 volts.