What happens if there is no current?

When there is no current in the wire, their is no magnetic induction. The electromagnet then is simply a coil with no magnetic field associated with it. The moment we allow a current to flow through, there is a magnetic induction and thus we get an electromagnet.

Does voltage depend on current?

Both are true. The voltage measured across a particular resistor depends upon the amount of current (amps) flowing thru it. But the amount of current depends on the voltage (pressure) on the circuit containing the resistor.

Why do I have voltage but no amps?

The most common cause of no amperage is a bad contact somewhere between the rectifier and the load. This can be in the buswork, at the saddle, or even where the anodes sit on the bar. If the voltage at the tank is within 5\% of the rectifier’s voltage, then it is unlikely that you have a connection issue.

Can voltage exist without electric field?

Voltage can exist without any “unit charge” being present, and without any P.E. being stored as the unit charge moves across a certain voltage.

Is voltage more important than current?

Voltage and amperage are two measures of electrical current or flow of electrons. An electrical current at 1,000 volts is no more deadly than a current at 100 volts, but tiny changes in amperage can mean the difference between life and death when a person receives an electrical shock. …

How do you find current with only voltage?

If the voltage (V) and resistance (R) of any circuit is given we can use the current formula to calculate the current, i.e., I = V/R (amps).

Is voltage required to create current or is current required to create voltage?

7 Answers. One doesn’t necessarily cause the other. But you can’t (except in special cases such as a superconductor or a perfect insulator, only one of which actually exists) have one without the other. You can’t produce a voltage without supplying charge (or current) to force some place to have that voltage.

Can voltage be turned into current?

As we know, if we apply a voltage VIN across a resistor R, a proportional current IOUT = VIN/R begins flowing through the circuit. We may say that this is a voltage-causes-current formulation of Ohm’s law: I = V/R. A bare resistor can convert the voltage into current.

Can transformer have voltage but no current?

So, if there is no current flow between two points, it simply implies that there is no voltage difference between them. Thus, a voltage always exists, it may either be positive, negative or zero between two points, but the flow of current depends only on the voltage gradient between them.

What does it mean to have 0 current?

An open circuit implies that the two terminals are points are externally disconnected, which is equivalent to a resistance R=∞ . This means that zero current can flow between the two terminals, regardless of any voltage difference.

Why is there no current?

The current is due to flow of charge in a definite direction. Therefore, there is no current in metal in the absence of electric field. In the presence of electric field, each free electron experiences a force opposite to the direction of experiences a force opposite to the directgon of field.

Is it possible to have high voltage without any current?

Voltage is sometimes described as the ‘push’ or ‘force’ of the electricity, it isn’t really a force but this may help you to imagine what is happening. It is possible to have voltage without current, but current cannot flow without voltage.

Can voltage exist without current?

Voltage is like an electrical pressure or push, it can cause electric charges to flow. Or, if flowing charge is suddenly blocked, this can cause a momentary voltage to appear. But current can exist without voltage, and voltage can exist without current. Voltage exists in space, not just on surfaces.

Does voltage always cause current?

Voltage, as an expression of potential energy, is always relative between two locations, or points. Sometimes it is called a voltage “drop.” When a voltage source is connected to a circuit, the voltage will cause a uniform flow of charge carriers through that circuit called a current.

How does a voltage cause current to do work?

When a voltage source is connected to a circuit, the voltage will cause a uniform flow of charge carriers through that circuit called a current. In a single (one loop) circuit, the amount of current at any point is the same as the amount of current at any other point.