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A copper wire was left connected from one terminal of a battery to the other The wire became very hot Why did the wire get so hot?
The wire acted as the load across the battery terminals. Small short pieces of wire have a very low resistance. Ohms law states I = E/R. Current is directly proportional to the voltage and inversely proportional to the resistance of the circuit. So in other words if the resistance goes low the current (amperage goes high) It is this high current flowing through the wire that makes the wire hot. The higher the resistance the less of a current flow through the wire.
Relationship between the length of wire and its electric current?
The electrons in a conducting wire are loose and can move freely. When the circuit is closed, a potential difference is set up across the terminals. The battery maintains this potential difference. Then the electrons in the wire move towards the positive terminal of the battery. This flow of electrons constitute the electric current.
Does more current pass through a thick wire than through a thin wire?
Yes, more current will typically pass through a thick wire compared to a thin wire because the thicker wire offers lower resistance to the flow of electricity. This lower resistance allows more electrons to flow through the wire more easily, resulting in a higher current.
Why any electric wire get suddenly cool when electric current cutoff?
Heat in an electric wire is mainly caused by the rapid movement and collision of electrons as they flow along it, when an electric current is cut off, the flow is greatly reduced causing a huge drop in temperature.
What is the relationship between the size of the electric current passing through a length of wire and its heating effect?
The heating effect of a wire is directly proportional to the square of the current passing through it. This relationship is described by Joule's Law, which states that the heat produced is equal to the current squared multiplied by the resistance of the wire and the time for which the current flows.
What is the impact of the flow of current through a wire on its conductivity and resistance?
The flow of current through a wire increases its conductivity and decreases its resistance.
What is the effect of changing the thickness of the wire?
Changing the thickness of the wire will affect its resistance. Thicker wire has lower resistance, allowing more current to flow through it with less energy loss as heat. Thinner wire has higher resistance, restricting the flow of current and causing more energy to be lost as heat.
If you wire up a circuit with very thin wire what effect might this have?
less current will flow as resistance is inversely proportional to area
Why increasing the voltage applied to a wire can have the same effect on the current in the wire that decreasing the resistance of the wire does?
Increasing the voltage applied to a wire will increase the electric field, which in turn accelerates the charge carriers (usually electrons) in the wire, leading to an increase in current. Similarly, decreasing the resistance of the wire allows more current to flow for the same voltage applied, achieving a similar effect of increasing the current. Both actions result in a greater flow of charge carriers through the wire.
If diameter in of a wire increases the resistance of the wire?
No, the resistance of a wire decreases as the diameter increases. This is because a wider wire provides more pathways for the electrons to flow through, reducing the resistance to the flow of current.
What is effect of voltage and current by changing the length of wire?
By changing the length of wire, say reducing it, the resistance will drop and that will increase current flow but the voltage is less likely to change V=IR.
Does the temperature of the wire affect the current?
Yes, the temperature of the wire can affect the resistance of the wire, which in turn can affect the current flowing through it. As the temperature increases, the resistance of the wire also increases, which can reduce the current flow.
Will current flow more easily through a long wire or a short wire?
Current will flow more easily through a short wire compared to a long wire because the resistance of a wire increases with its length. A longer wire will have more resistance, resulting in a lower current flow compared to a shorter wire.
Does the thickness or the length of the wire effect the brightness of the bulb?
The thickness of the wire (resistance) and length of the wire can affect the brightness of the bulb. Thicker wire has less resistance, allowing more current to flow and producing a brighter bulb. Shorter wire lengths also reduce resistance, resulting in a brighter bulb due to more current flowing through it.
What causes heating in wire?
Heating in wire is caused by the flow of current through the wire. The resistance in the wire causes energy to be converted into heat as the electrons move. This heating effect is known as Joule heating.
What is effect of temperature on resistance of a wire?
As temperature increases, the resistance of a wire also increases. This is because as the temperature rises, the atoms in the wire vibrate more vigorously, causing more collisions with electrons and impeding the flow of current. This relationship between temperature and resistance is known as the temperature coefficient of resistance.
How does width of the wire affect the flow of current in a wire?
it just does The thicker the wire the more space there will be for electrical current to flow. What this means is that the electrons have a lesser chance of hitting the atoms and causing resistance.
