0
yes
the current can flow through a short circuit but there is no voltage because of the zero resistance
hence current through the circuit will be infinite
The above is of course a strictly theorethical truth. In the real world, several things limit current. The power source has a finite capacity, sometimes expressed as internal resistance, sometimes in max current, etc. All the wires, connections, and switches also have resistance. At high levels of current like this, even a small resistance will introduce a significant voltage drop. Use Ohms law, and you'll quickly see that with small amounts of resistance, infinite current isn't a real world situation. Likewise there will always be a certain small voltage, otherwise, there could be no current..
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoNo (well, no, usually). Voltage is a potential difference/ build up of electrons at one location relative to another; current is the flow of electrons. You cannot have electrons flow without having a potential difference.
Ohms law states V = I*R. If V = 0, then I or R must also be zero. If I is not zero, R must be zero which does not occur in the real world.
...With one exception - superconductors! Superconductors, when cooled to a specific temp, have (effectively) no resistance, and therefore can have a current flow with no loss. This is why a voltage can be applied to a superconductive ring, the voltage can be taken away (by shunting the source out with a superconductor), and current will continue to flow. BUT a beginning potential difference / voltage is required to jump start everything.
Wiki User
∙ 12y agoFollowing ohms law, I = V/R. if R is near zero (what a short circuit means), current will become very large. Short circuit current magnitude is dependent upon the source resistance, as the load becomes zero. The voltage V ends up dropping across the source resistance. The current through the source resistance still must pass in a loop to ground through the short.
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Why in slip test the machine voltage reduced?
The low slip test is used to determine the D and Q axis impedance of salient pole machines. The machine terminals are short circuited, each phase voltage and current are measured. Since the terminals are short circuited, machine voltage must be reduced to prevent excessive output currents that would damage the machine.
Why the CT secondary short circuited?
Current transformers produce a ratio of primary current in the secondary. If the secondary of a CT is open circuited, and primary current is flowing, the CT will try to push that same ratio of current through the secondary open circuit. This causes secondary voltage to climb until it the secondary open circuit flashes over. This can often damage the CT.
Why high voltage is kept open in open circuit and low voltage is shorted in short circuit test?
In Short circuit test High Voltage side is feeded with 2-5% of the High Voltage rating to circulate approximately full load current in low voltage winding by short circuiting it. Low voltage is generally short circuited to facilitate measurements because it is more difficult to measure the quantities at high voltages.
Why secondary windings of current transformers are shorted?
Current transformers (CTs) -together with voltage (or potential) transformers- are 'instrument transformers'. CTs are used to enable large currents flowing in high-voltage systems to be measured, while electrically-isolating the ammeter (termed a 'burden') from the h.v. system. They are also used to monitor h.v. currents for high-voltage protection systems. Before disconnecting its burden, the secondary of a CT must be short-circuited, and remain short-circuited until after the burden has been replaced. This is because a dangerously-high voltage will appear across the open terminals of any energised CT.
What happens if a dependent current source is short circuited?
Nothing happens.
What is output short circuit current?
The output short circuit current is the solar cell's current when the voltage is zero, or when it, is short circuited.
Why is current maximum when short circuited?
when its is short circuited there will not be any drop and hence the current will b maximum when its is short circuited there will not be any drop and hence the current will b maximum
Why should the secondary of a voltage transformer not be short circuited?
A voltage transformer takes a primary voltage and steps it down to a smaller secondary voltage. This type of transformer will attempt to keep the secondary voltage at a specific ratio of the primary voltage. If you short it, massive current flow in the secondary is required to do this. For a similar reason a CT should never be open circuited - because it attempts to push a specific ratio of primary current through the secondary. If you open circuit the secondary, it takes a massive voltage on the secondary to accomplish this.
Why in slip test the machine voltage reduced?
The low slip test is used to determine the D and Q axis impedance of salient pole machines. The machine terminals are short circuited, each phase voltage and current are measured. Since the terminals are short circuited, machine voltage must be reduced to prevent excessive output currents that would damage the machine.
Why the CT secondary short circuited?
Current transformers produce a ratio of primary current in the secondary. If the secondary of a CT is open circuited, and primary current is flowing, the CT will try to push that same ratio of current through the secondary open circuit. This causes secondary voltage to climb until it the secondary open circuit flashes over. This can often damage the CT.
Why high voltage is kept open in open circuit and low voltage is shorted in short circuit test?
In Short circuit test High Voltage side is feeded with 2-5% of the High Voltage rating to circulate approximately full load current in low voltage winding by short circuiting it. Low voltage is generally short circuited to facilitate measurements because it is more difficult to measure the quantities at high voltages.
Why should current transformers be shunted before opening the secondary winding?
A current transformer's secondary must never be open-circuited. If the instrument fed by a CT needs to be removed, then the secondary terminals must be short-circuited first. This is because a large, and potentially-dangerous, secondary voltage will appear across an open-circuited CT. Normally, a set of links is provided at those terminals for this purpose.
What are the reasons why a current is induced in a coil?
Current is not induced into a coil. It's voltage that is induced into a coil. If the coil is connected to a load, or even short circuited, then a current will flow as a result of the induced voltage -but it's the voltage, not the resulting current, that's induced!Voltage is induced into a coil because the the changing magnetic field, due to the change in current (0 to Imax or vice versa) applied to that coil. The process is called 'self induction'.
Why secondary windings of current transformers are shorted?
Current transformers (CTs) -together with voltage (or potential) transformers- are 'instrument transformers'. CTs are used to enable large currents flowing in high-voltage systems to be measured, while electrically-isolating the ammeter (termed a 'burden') from the h.v. system. They are also used to monitor h.v. currents for high-voltage protection systems. Before disconnecting its burden, the secondary of a CT must be short-circuited, and remain short-circuited until after the burden has been replaced. This is because a dangerously-high voltage will appear across the open terminals of any energised CT.
What happens if a dependent current source is short circuited?
Nothing happens.
Why the coil of a transformer donot get short circuited even though it is continuous wire?
If energized from the high side, the induced voltage in the secondary counter acts the current flowing in the primary (or pushes against the flow of current in the primary). This is a fundamental property governing the operation of induction - the induced voltage on a wire from another source will induce a voltage back on the source in the opposite direction of the source's voltage.
When the current will be short and open circuited?
Open circuit has no current, so does that mean any resistor in series with it, has no current ,so it can be ignored for analysis( v=ir so 0 current means 0 V) for finding lets say the Thevenin equivalent.? Now for Short circuit, do we ignore a resistor in series with the short, because current will take path of least resistance and ignore that resistor? Also can short circuit have voltage through it ?
