Electronics Engineering

Biasing of the transistor is responsible for stability of Q point.

A little more than 6 volts RMS, or 17 volts peak to peak (can get -6 and +6 voltage this way using a full wave rectifier).

The voltage will depend strongly on your design - are you using circuitry that clamps the output voltage to a specific value (you should!). If you are doing this, I would find the cheapest transformer that meets the current capacity you need that has an output near the 6 volts you want.

They will get you to Narnia and back within an hour although the exit may be time consuming to find.

The voltage is the same across all branches.

If this is a homework related question, you really should consider trying to solve it yourself before looking at this answer. Otherwise, the value of the lesson, and the reinforcement provided by the assignment, will be lost to you.

To calculate the current flow in one element of a parallel circuit, knowing the resistance of each element, consider the net resistance first.

Two resistors in parallel, R1 and R2, have a net resistance of R1R2/(R1+R2). For 50 ohms and 10 ohms, this is 8.333 ohms.

Now, consider the voltage across the resistors. By Ohm's law, voltage is current times resistance. For 12 amps and 8.333 ohms, you get 100 volts.

Now, consider the current through one resistor, By Ohm's law, current is voltage divided by resistance. For 100 volts and 50 ohms, you get 2 amps.

All of that said, now to the easier method...

Resistors in parallel form a current divider, just like resistors in series form a voltage divider. You have two resistors, 10 ohms and 50 ohms, with 12 amps going through them. The current through the 50 ohm resistor is the ratio of the other resistor divided by the sum of the two resistors. This is 12 amps times 10 / (10 + 50), or 12 amps times 1 / 6, or 2 amps.

You charge all capacitors the same way - you apply a current across them. The equation is dv/dt = i/c.

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This is a 'chicken and egg' situation. The current passing through your body is determined by the voltage applied across your body, together with the resistance of the current path. So whilst it is true that it is the current that harms you, the voltage has to be high enough to cause the necessary amount of current to flow. In other words, it is equally valid to say that it is the voltage level that causes electrocution.

An analogy might be, which kills you: the height through which you fall, or hitting the ground? Obviously, hitting the ground is what kills you, but the height from which you fall determines how hard you are going to hit the ground.

As far as damage to electrical circuits is concerned, excessive voltage is responsible for insulation breakdown, while current is responsible for components to overheat. So high current will most certainly damage those components.

No. As temperature increases, resistance of semiconductors decrease.

This is because semiconductors have a small energy gap between their valence band and conduction band (in the order of 1 eV). Electrons must exist in the conduction band in order for the material to conduct but electrons exist in the valence band naturally. The electrons gain thermal energy for surroundings and jumps the energy gap from valence band to conduction band and hence, the SC material more readily conducts. As temperature increases, electrons can gain more thermal energy, more electrons can enter the conduction band and hence, resistance decreases.

In theory ... on paper where you have ideal components ... a capacitor all by itself doesn't have

a time constant. It charges instantly. It only charges exponentially according to a time constant

when it's in series with a resistor, and the time constant is (RC). Keeping the same capacitor,

you change the time constant by changing the value of the resistor.

RV designator is used for varistors.

Based on the Crystal used in the circuit, and the divisor selection, the processor clock frequency is obtained the tick time is the min clock cycles required to do a nop operation

How an image is formed on the tv screen

The cost of a wind turbine varies greatly depending on the size. A small turbine can be purchased for around 1200 dollars while large turbines can be several hundreds of thousands of dollars.

Sprint, Clearwire

the current causes alternating magnetic fields which shake the wires and they get warm so snow and rain sizzle off the wires.

All electrolytic capacitors are polarized capacitors whose anode electrode (+) are made of a special metal on which an insulating oxide layer originates by anodization (forming), which acts as the dielectric of the electrolytic capacitor.

to convert the DC into DC.............

The higher the rate or roll-off, the higher the out of band attenuation.

High voltage is used to transfer power over long distances ONLY because the gauge of the wire can be smaller. Power transfer is always most efficient at the operating voltage if the size of wire is not an issue.

Stoves, heaters,incandescent light bulbs and other non-electronic, non-engine devices do not care about the frequency (Hz), so no conversion is required.

This is assuming that the voltage is the same. If a 120 V stove is to be used with 220 V electricity, a transformer would be required. (Although it might be cheaper to buy a new stove.)

Because the theoretical hearing limits of the human ear (in very young people who do not listen to loud music) is 20 Hertz to 20,000 Hertz. People with extremely good ears can hear musical tones as low as 20 Hz and as high as 20 kHz.

Get dimmer switches that use very high frequency oscillators. These work by flashing the light a large number of times per second(impossible to see). When you dim the light, the period that the light is off for is increased which makes the light look as if it has been dimmed regularly, except without the wastage of power that comes from using a resistor.