0
You may find the answer in my new page:
http://www.welding-advisers.com/High-Frequency.html
that you may copy in your site, if you like it, provided you maintain a Reference Link to the source.
Best Regards,
Elia Levi
To contact me please use the form at
http://www.welding-advisers.com/contact.html
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Explain seam welding and percussion welding?
Seam welding- resistance welding process involving the use of (normally) copper or copper alloy rollers to simultaneously pass high current (10^4 amps and usually in pulses) and apply pressure to bond a lap seam between two pieces of sheet metal. Percussion Welding- arc welding process involving the use of a capacitor bank to bond on the order of milliseconds. A high current electric arc is developed between the items to be joined, and the items are rapidly accelerated together.
Do living cells have a high resistance to electric current?
yes
Why the high resistance earth fault in the appliance increase the risk of electric shock when using appliance in earth situation?
If the earth connection has a high resistance it is not capable of acting as a true earth. For example, the high resistance might mean that the fuse or circuit-breaker will fail to operate when there is a fault.
What is the effect of bypass capacitor on frequency response?
Gain in a CE configuration of a BJT is collector resistance divided by emitter resistance, subject to the limit of hFe. The emitter bypass capacitor will have lower impedance at high frequency, so the gain will be higher at higher frequency, making this a high-pass amplifier.
Why capacitor short circuit in ac and open circuit in dc analysis?
Reactance of capacitor is inversely proportional to frequency. I should not need to write the exact equation here, its in your textbook. All you need is that its inversely proportional to frequency for proof.We will now assume an ideal capacitor to keep the analysis simple.at DC the frequency is zero, the inverse of this is infinite reactance: open circuitat low frequency AC frequency is low, the inverse of this is high reactanceat midrange frequency AC frequency is midrange, the inverse of this is midrange reactanceat high frequency AC frequency is high, the inverse of this is low reactanceat infinite frequency AC frequency is infinite, the inverse of this is zero reactance: short circuitThis disproves your original statement as written, except for the special cases of DC and infinite frequency AC (which does not occur), for ideal capacitors.As all real capacitors are nonideal, they have leakage resistance. This means that even for the special case of DC the capacitor is not a true open circuit, just a very high resistance resistor. Which also disproves it for the remaining case of DC in real capacitors.
What is high frequency welding?
High frequency welding is a process where plastics such as PVC are heated with high frequency waves. This is to soften the plastics for easier molding.
What has the author Robert K Nichols written?
Robert K. Nichols has written: 'High frequency pipe & tube welding' -- subject(s): Pipe, High Frequency welding, Welding
Explain seam welding and percussion welding?
Seam welding- resistance welding process involving the use of (normally) copper or copper alloy rollers to simultaneously pass high current (10^4 amps and usually in pulses) and apply pressure to bond a lap seam between two pieces of sheet metal. Percussion Welding- arc welding process involving the use of a capacitor bank to bond on the order of milliseconds. A high current electric arc is developed between the items to be joined, and the items are rapidly accelerated together.
What type welding current may be used with GTAW?
A C, with high frequency superimposed, when welding Aluminum. D C straight polarity on almost everything else.
Do living cells have a high resistance to electric current?
yes
What is a material that conducts electric current?
Material with high resistance
Will a circuit component with a high resistance will have a low electric current?
Yes
What is a material that conducts electric current slowly?
Material with high resistance
Difference between electric cautery and ligasure vessel sealing system?
An electric cautery is a monopolar high frequency electrocautery. A ligature vessel sealing system, on the other hand is a bipolar high frequency electrocautery.
If voltage is high will the resistance be high?
The electric resistance is related to the diameter and extension of the wire submitted to a determined voltage which will determine the electric current flowing into the wire.AnswerVoltage has no effect on resistance. Resistance is determined by the length, cross-sectional area, and resistivity of a material (resistivity is affected by temperature, so temperature indirectly affect resistance).
What is the electric charge of gamma radiation?
Gamma radiation is simple a very high-frequency form of electromagnetic radiation (essentially, a high-frequency form of light which is invisible to the human eye). As such it carries no electric charge; it is neutral.
How to do the megger test in electric motor?
Briefly, a megger test is testing an electric circuit at load. The circuit might prove good at normal resistance measuring but fails when applying high voltage. Read the megger result correctly, every electric circuit will fail if stressed high enough. Disconnect any servo drive or frequency controller before testing.
