Electronics Engineering

Silver is the best conductor of electricity among common metals. It has the highest electrical conductivity of any metal and is often used in applications where high conductivity is essential, such as in electrical wiring.

Voltage drop is the decrease in electrical potential energy of electrons as they move through a circuit due to resistance. When electrons encounter resistance, they transfer some of their energy to overcome it, resulting in a decrease in voltage along the circuit. This drop in voltage is proportional to the resistance in the circuit and can affect the performance of electrical components.

Yes the circuit needs to have no breaks or have the switch open to let the electrons pass through.

1st is in a.c there is frequency say 50 hz in d.c. it is zero means a.c. produces 50 cycles per second . n d.c. is steady current. 2nd is in a.c inductance comes into picture. but when it is d.c. inductance is zero. 3rd is in a.c skin effect is there. due to this its resistance is high in a.c. as compared to when d.c. current is flowing. 4th is in a.c ,we can quench the arc when fault occurs very easily rather then d.c. current. 5th and major difference is that when we have a.c. quantity we are able to step up or step down the voltages but in d.c. its not possible to get. i hope everybody can understand. bye.

An LED is a diode that emits light; diodes allow current to flow only one direction. The voltage applied to the diode attempts to force current to flow in a specific direction. If the voltage polarity is reversed, and current was flowing before (so there was a small voltage drop across the diode), current will cease to flow (assuming the voltage is not too high for the diode to handle), and (almost) all the voltage will be dropped across the diode (a small leakage current may flow, which means some of the voltage will not be dropped across the diode, but this is in the milli or micro range).

I would never define a diode as a "voltage controller" or "current controller". It could be either or both, from the above description.

When too much current flows through a conductor, it is called an overload. This can lead to overheating and may damage the conductor or the connected equipment if not addressed.

You need basically two things: a complete, closed-loop conductive path and an electro-motive force, that is, a voltage. Check out this picture for a simple circuit containing a battery, two wires, and a light bulb: http://www.bbc.co.uk/schools/ks3bitesize/science/images/sci_dia_52.gif. The wires and bulb complete the conductive path from, and returning to, the battery.

The relative magnitudes of the field in different regions can be determined from an electric field line diagram by looking at the spacing between the field lines. Regions with field lines that are closer together represent stronger electric fields, while regions with field lines that are farther apart represent weaker electric fields. The density of field lines can give an indication of the relative magnitude of the electric field strength.

No, a voltmeter measures voltage in a circuit but cannot increase it. It is a passive device that is simply used to read the voltage at a specific point in the circuit.

Free electrons are in a constant state of chaotic movement in all directions. Under the influence of an external electric field, the continue to move in all directions, but there is a bias in one direction. So when we describe an electric current, the movement of individual electrons along a conductor is V-E-R-Y slow. So slow, in fact, that an individual electron is unlikely to pass through the filament of a flashlight before its battery has expired!

you should be paying attention in class. you should listen. you should know the answer. what is your problem big man. the answer is obvious. it is 25 volts

Negative watts in measuring typically indicate that the device is consuming energy rather than generating it. This is common in situations where energy is being supplied to a device, such as when charging a battery or running an appliance.

Just one! You'd never believe it but you only need one wire in a curcuit. unless things are stopping it then you need more. it depends on what materials you are using. my physics teacher always told me that the clips on the end of the wire are crocodiles and if i didnt do my experiments properly, i would be eaten alive :) i was the best student in the class after that experience.

Yes, a 230V bulb can be used on a 120V circuit, but the power output of the bulb will be approximately one quarter. (Half the voltage and half the current) Note, however, that since the bulb will be cooler, the resistance will be slightly less, so power will be somewhat higher than expected, but estimated figure is still one quarter.

To construct a working simple circuit, you will need a power source (such as a battery), a load (such as a light bulb or a motor), conductive pathways (wires) for the electricity to flow, and a switch to control the flow of electricity.

Electrical current is the number of elementary charge units (coulombs) that pass by a given point in one second. Current, measured in amperes, is coulombs per second.

Electrical voltage is the "pressure" behind that current. Voltage, measured in volts, is joules per coulomb.

23 volts across 470 ohms will dissipate about 1.1 watts.

Power equals voltage squared divided by resistance.

You do not need ohm's law to relate power to current and voltage. Power is current times voltage. If you know current and voltage, you do not need to know resistance.

Avalanche breakdown in Silicon-Controlled Rectifiers (SCRs) refers to the rapid increase in current flow through the device due to high reverse voltage. This phenomenon occurs when the reverse voltage exceeds the breakdown voltage of the SCR, causing a sudden breakdown of the junction and a rapid increase in current flow. Avalanche breakdown can damage the SCR if not properly controlled.

The formula to calculate the rotor speed (N_r) of a cage rotor induction motor is given by: N_r = (120 * f) / P, where f is the supply frequency in Hz and P is the number of poles in the motor. This formula assumes the motor is running at near synchronous speed and neglects slip.

Radar range is affected by various factors, including the transmitted power, beamwidth, frequency, propagation losses, and antenna gain. Antenna gain plays a crucial role in determining the effective range of a radar system, as it focuses the transmitted energy in a particular direction, increasing the signal strength in that direction and consequently extending the radar range. A higher antenna gain typically results in a longer radar range by improving the system's ability to detect and track targets at greater distances.

No, because molten sulfur is not ionic or metallic, so even if it did conduct, it would be a very, very poor conductor.

To calculate the voltage across a 600-ohm resistor, you also need to know the current passing through it. Using Ohm's Law (V = I * R), where V is the voltage, I is the current, and R is the resistance, you can determine the voltage.