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Your question is better expressed as why can an ac circuit be shorted to earth when a dc circuit can't be? With an ac supply only the positive feed is actually present at the socket. There is no negative, just a neutral return which is actually connected to earth at the power station / substation. Earthing an ac curcuit just provides a shorter route to the earth, which is where it would have gone anyway. The earth connection at the socket is just to provide a safe means of dumping the current locally in the event of a fault. In a dc circuit the current has nowhere to go, other than to the negative terminal / rail. Without both positive and negative being present no circuit can be formed.
What else can I help you with?
What is the basic function of chopper circuit?
to convert the DC into DC.............
If you have a DC passing through a circuit will the current decrease when you add a DC motor and if so by how much?
In the circuit where the DC motor is added, it was not specified whether the motor was added in series or in parallel to circuit elements. If it was added in series, it will increase circuit resistance and it will cause circuit current to go down. In parallel, the motor will reduce total circuit resistance, and circuit current will increase.
In the simplest of dc circuits where the resistance is zero what kind of circuit is it?
A short circuit.
How does current flow in a standard DC circuit?
(the current in the earth direction is going left of use) 8th grade studend juicey babee
A circuit carrying current in one direction is called a?
A circuit carrying current in one direction is called a direct current (DC) circuit. In a DC circuit, the flow of electric charge is constant and does not change direction. This is in contrast to an alternating current (AC) circuit, where the flow of electric charge changes direction periodically. DC circuits are commonly used in electronics and power transmission systems.
Which circuit element is used to block DC in an electronic circuit?
Capacitance will block DC
Why DC supply is used in control circuit?
dc supply is used for control circuit because dc current is an independent source .
Why use DC circuit when frequecy is zero?
DC has no frequency.
What is the basic function of chopper circuit?
to convert the DC into DC.............
Can you call dc-dc converters as a chopper circuit?
yes definitely you can
If AC is replaced by DC in a fluorescent lamp circuit will the circuit work?
No.
If Transformer on a DC circuit?
Trsansformers work on mutual induction principle caused by the changing magnetic field. Since there is no changing magnetic field i.e there is no "+" and "-" cycle in DC source supply so transformer cant work on a DC source. Its core will become permanent magnet.
What is the direction of DC current flow in a circuit?
In a circuit, DC current flows from the positive terminal of the power source to the negative terminal.
Can a step down transformer increase current in a DC circuit?
Transformers only work with alternating currents. So the answer is Yes, BUT it would have to be a DC Pulsing circuit. using flip flop circuit or a 555 circuit or chop circuit.
If you have a DC passing through a circuit will the current decrease when you add a DC motor and if so by how much?
In the circuit where the DC motor is added, it was not specified whether the motor was added in series or in parallel to circuit elements. If it was added in series, it will increase circuit resistance and it will cause circuit current to go down. In parallel, the motor will reduce total circuit resistance, and circuit current will increase.
Why capacitance is not used in DC circuits?
as it acts ideally as open circuit for dc
What is the direction of current flow in a DC circuit?
In a DC circuit, the direction of current flow is from the positive terminal of the voltage source to the negative terminal.
