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Is Welding set a high voltage or high current load?
The arc utilized for arc welding is low voltage high current discharge. The voltage required for maintaining an arc is less than for striking the arc. Voltage drops & current increases as the arc is developed. The voltage required to strike DC arc is about 50-55 V & for AC is 80-90 V.It is difficult to maintain the arc with voltage less than 14V or more than 40V.READ ELECTRICAL TECHNOLOGY BY B L THAREJA / AK THAREJA
Why instruments are connected on low voltage side of the transformer while performing no load test?
since we need to get desired or rated voltage, so if it is connected in high voltage side of the transformer, voltage supply will be more, and hence the current will be more than the required amount. this is the reason why the instruments re connected at the low voltage of the transformer while performing no load test.
Why do the voltage drops of an inductor and a lamp in a series ac circuit not equal the applied voltage?
The voltage is greater than the applied voltage, why?
When a diode reduces the input voltage?
When a diode reduces the input voltage, it typically operates in the forward bias condition, allowing current to flow while dropping a specific voltage across it, known as the forward voltage drop (usually around 0.7V for silicon diodes). This voltage drop occurs due to the energy required to overcome the potential barrier of the diode's p-n junction. As a result, the output voltage is lower than the input voltage by this forward voltage drop, effectively regulating the voltage in circuits like rectifiers or clamping applications. In reverse bias, a diode ideally blocks current flow, maintaining the input voltage level until breakdown occurs.
Why is the breakdown voltage greater than barrier potential?
The breakdown voltage is greater than the barrier potential because it represents the voltage at which a significant increase in current occurs due to the breakdown of the insulating properties of a material, such as a diode or semiconductor junction. While the barrier potential is the voltage required to overcome the energy barrier for charge carriers to cross the junction, breakdown voltage indicates the point at which the electric field becomes strong enough to ionize atoms or create charge carriers, leading to a dramatic increase in conduction. Thus, the breakdown voltage must exceed the barrier potential to initiate this avalanche of charge carriers.
What will happen if current is more than required in diode?
If the applied voltage is greater than maximum forward voltage, the diode will get damaged..
Is Welding set a high voltage or high current load?
The arc utilized for arc welding is low voltage high current discharge. The voltage required for maintaining an arc is less than for striking the arc. Voltage drops & current increases as the arc is developed. The voltage required to strike DC arc is about 50-55 V & for AC is 80-90 V.It is difficult to maintain the arc with voltage less than 14V or more than 40V.READ ELECTRICAL TECHNOLOGY BY B L THAREJA / AK THAREJA
Can rheobase be a threshold stimulus?
Yes, it can be because threshold and rheobase both are the voltage required to generate an action potential. The difference lies in that the treshold can be a voltage higher than rheobase.
What voltage produced maximal contraction of the muscle?
The voltage that produces maximal contraction of a muscle is called the maximal stimulus voltage. This voltage is typically higher than the threshold voltage required to elicit a muscle contraction and ensures that all muscle fibers within a motor unit are stimulated to contract simultaneously, leading to a stronger contraction.
Why instruments are connected on low voltage side of the transformer while performing no load test?
since we need to get desired or rated voltage, so if it is connected in high voltage side of the transformer, voltage supply will be more, and hence the current will be more than the required amount. this is the reason why the instruments re connected at the low voltage of the transformer while performing no load test.
True or False The voltage rating of a fuse can be greater than the circuit voltage?
True. The voltage rating of a fuse must be greater than the circuit voltage.
What are advantages of voltage divider bias over the other types of biasing ci?
You can use more than one type of voltage divider in it. It can sometimes get mixed signals with all the things going on.
Is fwd break over voltage is greater than reverse breakdown voltage i.e VboVbr?
forward breakover voltage is slightly smaller than reverse breakdown voltage
Why do the voltage drops of an inductor and a lamp in a series ac circuit not equal the applied voltage?
The voltage is greater than the applied voltage, why?
What is the purpose of capacitor in power supply higher than rated voltage?
The voltage marked on a capacitor is its MAXIMUM SAFE WORKING VOLTAGE. The capacitor will work in a circuit at any voltage lower than that, but it may fail at any higher voltage.
What is the meaning of high voltage?
High voltage refers to an electrical potential difference that is significantly higher than the standard voltage levels used in household or industrial settings. It is typically used for long-distance power transmission and in industrial applications where high power levels are required. High voltage can be dangerous to humans and should be handled with caution.
What is the minimum voltage required to turn on a pnp transistor?
If it's a germanium transistor, 0.3 volts. If it's the more common silicon transistor, slightly more than 0.6 volts.
