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What are high voltage loads and high current loads and can you give examples for each?
Wiki User
∙ 14y ago
High voltage loads is a high electrical discharge that can result to electrical breakdown. Example: High power amplifier vacuum tubes or particle beams. High current loads are the loads that can have peak current greater than 10 amps. Example: Motors, solenoids or nitinol wire.
Wiki User
∙ 14y ago
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What happens to the voltage in a series circuit when more loads are added?
A: assuming a infinite current source the current will increase accordingly
Why are most industrial loads placed in parallel with the source and in series with a switch?
The loads are in series with the switch so the switch can turn them on and off. The loads are in parallel with each other so they each get the same voltage when the switch is turned on. (Kirchoff's voltage law) You would not want the loads in series with each other because they would then have half the voltage and one quarter the power that you probably intended. (Assuming consistent impedance) If you had the switch in parallel, and opened(turned off) the switch, there would still be a current along the whole circuit (except that which is in series with the switch)
Relation between voltage speed and current in alternating current motor?
voltage is inversly proportional to speed speed and current are directly proportional to each other but voltage and current are directly proportional to each other..
What is the meaning of current lags voltage?
'Current lags voltage' means that in the AC cycle the voltage peaks and the current peaks a little time (a fraction of a cycle) later. This happens with electrical loads like motors. When the current lags, there is a small period in each half-cycle when the voltage has reversed and the current has not reversed yet. This causes power to flow back into the supply from the load. So there is a loss of average power fed to the load for a given voltage and current. In this situation the power is the voltage times the current times the power factor, and the power factor is the cosine of the angle by which the current lags the voltage (counting 360 degrees as a full cycle).
WHY does adding more loads in a parallel circuit increase the current?
Adding more loads in a parallel circuit increases the current because of Kirchoff's voltage and current laws, and because of Ohm's law...1. Kirchoff's voltage law states that the signed sum of the voltage drops around a series circuit is zero. A consequence of this is that the voltages across elements of a parallel circuit must be the same.2. Ohm's law states that current is voltage divided by resistance. Since the voltage across each new parallel element is the same, the current in that element is known. A consequence of this is that each additional element does not change the current in the other elements.3. Kirchoff's current law states that the signed sum of the currents entering a node is zero. A consequence of this, and 1 and 2 above, is that the currents added by each parallel element increases the total current entering the set of parallel elements.
Why voltage and current are in phase in a resistive circuit?
Because current and voltage are in proportion to each other, by Ohm's law.
Why does voltage change across components but not current?
we know,v=IRresistor, capacitor, inductor and other electrical components have their own specific characteristics to drop voltage or to consume voltage at a fixed amount.the supplied voltage produces a current that changes with the change of the voltage. It doesn't changes simultaneously. so the voltage change across the components. but the current doesn't changes across component...AnswerThink of a circuit with several loads as being rather like a number of central heating radiators connected in the same way. The same water (current) flows through each radiator. In order for that water to flow, we need a pump to supply pressure (supply voltage) across all the radiators. At the same time, there must also be a pressure difference (voltage drop) across each individual radiator or the water wouldn't flow through it. The sum of these individual pressures must add up to equal the pressure supplied by the pump.So the same current flows through individual loads, driven by the supply voltage applied across the entire circuit. At the same time, there must also be voltages across individual loads (called 'voltage drops'), or current wouldn't be flowing through them. The sum of the individual voltage drops will equal the supply voltage.
What is the relationship between the potential difference across a battery and the potential difference across each load in a parallel circuit?
Without specifics (are all the batteries end to end or are some loads between batteries, are all the loads the same resistive, capacitive or inductive value...), the generic answer is: the sum of supplied voltages must equal the sum of voltage drops across the loads.
What is the phase angle between voltage and current in a purely resistive circuit?
The phase angle between voltage and current in a purely resistive circuit is zero. Voltage and current are in phase with each other.
Why a voltage is always connected in parallel?
Because Voltmeter measures potential difference BETWEEN two points so it should be connected to these two points and the only way for circuit and voltmeter to be both connected to the same 2 points is in parallel. Ampermeters measure the current THROUGH some circuit so the same current that is flowing through this circuit should flow through the ampermeter too. The only way is to let the current going through the circuit to go through the ampermeter later or before, so you have to connect ampermeter in series with your circuit. The fact that voltmeters have high resistance while ampermeters have low resistance is the side effect of the way how they are connected to reduce the error introduced by devices into measured value.
Are amps constant in a parallel circuit?
The short answer is NO. PARALLEL circuits are those in which two or more physical branches (the wirings) are connected together at the endpoints of each branch. This means that each branch has the same voltage V applied to it (across it). Since each branch may have different types of components (the loads), the current in each branch can be different, since current I is the voltage V across a branch divided by the effective load resistance R, then I= V/R . Since the voltage across each branch is the same, if R varies in each branch then current I must vary in each branch. A SERIAL circuit has the SAME current since it is formed by connecting the branches (components) together in a consecutive string so that the current flowing in one must be the same as the next. In this case then the voltage must be different across each component if the R of each component is different.
What happens to voltage and current in a parallel circuit?
-- The voltage between the ends of each parallel branch is the same. -- The current through each parallel branch is inversely proportional to the resistance of that branch. (It's the voltage divided by the resistance of the branch.)
