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Electronics Engineering
Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.
24,372 Questions
What is the use of connections?
Computer connections are important because they allow the user of a computer to access other electronic devices such as your printer, Xbox360 console or television set.
In a flip-flop circuit, the clock signal serves as a timing reference that controls when the flip-flop changes its output state. The flip-flop typically samples its input data on the rising or falling edge of the clock signal, meaning it only updates its output based on the input state at that precise moment. This synchronization ensures that changes in state only occur at specific times, allowing for reliable data storage and transfer in digital circuits. By using clock edges, flip-flops can be integrated into sequential logic circuits, enabling the design of more complex systems like registers and counters.
No, air is not a semiconductor; it is generally considered an insulator. Semiconductors are materials that have electrical conductivity between that of conductors and insulators, typically characterized by their ability to conduct electricity under certain conditions. Air does not exhibit the necessary properties to be classified as a semiconductor, as it does not have a significant number of charge carriers available for conduction.
How are frequency and amplitude related?
They're not. The same amplitude can have high or low frequency,
and the same frequency can have large or small amplitude.
it invert the polarity of the in/out of the device. Inverter by definition invert one form to another form of energy [minus loss] so it can be used.
How you can choose the capacitor range for 24 volt output rectifier?
the high quality way is to rate the capacitor for:
2 times the DC voltage.
or
2 times the peak voltage of the transformer.
Consumer Industry does not care about prpoduct life span and accepts much less conservative "bare minimum" ratings to reduce cost:
1.5 times the DC voltage.
or
10% higher than the peak voltage of the transformer
A good 24V supply has a 35V capacitor.
Of course the cheaply made product will fail sometime with such narrow margin.
How do you interface external hardware through PC serial port?
Just use any of the compter language, say C,C++ make a program or rather i should say a software and then connect the hardware to the printer port and then execute the program to operate the hardware.
For example make a simple program to glow an LED through the pc, you can even use a micro-processor for the same...
Explain advantages and applications of switching regulators?
Switching regulator is a so simple switch in which the switch goes on and off at a fixed rate usually between 50Khz to 100Khz as set by the circuit. The main advantage of switching regulators is its high power conversion efficiency and increased design flexibility when it comes to multiple output voltages of different polarities can be generated from a single input voltage.
What is the three types of wave forms in trigger circuit of oscilloscope?
The three waveforms in the trigger circuit of an oscilloscope are the sine wave, square wave and saw tooth wave.
The characteristics curve of the component?
This is probably the I-V characteristic: Apply a voltage to one terminal of the component, the current through the component is then recorded; this is done for varying values, and is plotted out on a graph. For transistors, this shows where the "linear operation" region is; for diodes, this shows the "turn on" voltage. Such characteristics will be in the data sheets for whatever component you're using.
Which devices have characteristics very close to that of an ideal current source?
Most sources attempt to provide a specific voltage by design. An ideal current source does not do this, and thus there are not very many good examples. A current transformer, like what is used for relaying and metering in the power system, is an ideal current source - it provides a direct reflection of the amount of current flowing in the primary side to th secondary side, regardless of voltage in the secondary (up to saturation of the transformer).
A transistor amplifier may be set up as a current source as well. As in the above example, if the output resistance becomes too large, saturation of the transistor will occur causing it's characteristic output to be nonlinear.
A battery is an ideal voltage source in series with a variable resistance (the internal resistance of the battery). A charged capacitor can be thought of the same, without the internal resistance (since this is extremely small compared to the capacitance, it can be ignored in many cases).
A generator could be considered either a constant current source or voltage source, depending on how it is run. In some instances, a constant current will cause output voltage to increase or decrease. This variance can be controlled (to an extent) with external devices (capacitor and inductor banks, switching in and out specific lines, etc.). A generator can also be set up to provide a specific output voltage.
How do multibeam echo sounders work?
multibeam systems emit a fan of sound beams. By this method, a wide area of the seabed can be scanned in high detail.
What are magnetic shading coils and what do they do in a magnetic motor Starter?
Shading coils provide a phase shift between the magnetic field of the rotor and stator, which is necessary to get the motor spinning.
Sounds more like you're trying to measure resistance...
What is the formula for the series-parallel connection?
/t=/t1=/t2=/t3...
vt=v1+v2+v3...
rt=r1+r2+r3...
series formula....
Is current is drop when it flowing through the resistor?
Current flows in loops, voltage drops across elements. With relation to current, what flows in, must flow out, so no, current is not dropped across a resistor, it flows through a resistor and voltage is dropped across the resistor.
Belly flops are painful because when a person jumps or dives into water and lands flat on their stomach, the surface tension of the water creates a sudden and forceful impact. This can lead to a shock to the body, particularly the abdominal area and internal organs. The force of the impact can also cause bruising, discomfort, or even injury, making it a memorable and often painful experience.
What is an example of a circuit that doesnt obey Ohms Law?
The easiest circuit that does not obey Ohm's law is a circuit that has a resistance that depends on temperature. For example, if you take a light bulb and draw a current-vs-voltage, you see that in the beginning (under low voltage) the graph is NOT a straight line, but under high voltage the graph is linear. This is because the resistance depends on temperature. the equation V=IR isn't consistent with the graph's shape.
What ohm value or what combenation of resistors are needed to draw 20amps at 120v?
ohms = volts/amperes
6 ohms = 120 volts / 20 amperes
What is trusted platform module used for?
The primary scope of a TPM (in combination with other TCG implementations) is to assure the integrity of a platform. In this context "integrity" means "behave as intended" and a "platform" is generically any computer platform - not limited to PCs or just Windows: Start the power-on boot process from a trusted condition and extend this trust until the OS has fully booted and applications running.
Together with the BIOS, the TPM forms a Root of Trust: The TPM contains several PCRs (Platform Configuration Registers) that allow a secure storage and reporting of security relevant metrics. These metrics can be used to detect changes to previous configurations and derive decisions how to proceed. A good example can be found in Microsoft's BitLocker Drive Encryption (see below).
Therefore the BIOS and the Operating System have the primary responsibility to utilize the TPM to assure platform integrity. Only then can applications and users running on that platform rely on its security characteristics such as secure I/O "what you see is what you get", uncompromised keyboard entries, memory and storage operations.
[edit]Disk encryptionFull disk encryption applications, such as TrueCrypt, the dm-cryptfeature of modern Linux kernels and the BitLocker Drive Encryption feature of some Windowsoperating systems, can use this technology to protect the keys used to encrypt the computer's hard disks and provide integrity authenticationfor a trusted boot pathway (i.e. BIOS, boot sector, etc.). A number of third party full disk encryption products also support the TPM chip.
[edit]Password protectionAccess to keys, data or systems is often protected and requires authentication by presenting a password. If the authentication mechanism is implemented in software only, the access typically is prone to 'dictionary attacks'. Since the TPM is implemented in a dedicated hardware module, a dictionary attack prevention mechanism was built in, which effectively prevents from guessing or automated dictionary attacks, while still allowing the user for a sufficient and reasonable number of tries. With this hardware based dictionary attack prevention, the user can opt for shorter or weaker passwords which are more memorable. Without this level of protection, only passwords with high complexity would provide sufficient protection.
[edit]Other uses and concernsAlmost any encryption-enabled application can in theory make use of a TPM, including:
- Digital rights management
- Software license protection & enforcement
Other uses exist, some of which give rise to privacyconcerns. The "physical presence" feature of the TPM addresses some of these concerns by requiring BIOS-level confirmation for operations such as activating, deactivating, clearing or changing ownership of the TPM by someone who is physically present at the console of the machine.[6][7]
How do you work out the numerator of a transfer function?
G(s)= 60Ka / s(s+2)(s+6)
what is the numerator you have to use in MATLAB?
