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Why the temp of metallic wire rises when a current passes through it?
When current is passed through the wire, the negatively charged electrons (Current) face resistance as the molecules of the conductor block their way. These moving electrons collide with the molecules of the conductor and heat is produced which heats up the metallic wire.
How does resistance happen in a wire?
Resistance in a wire occurs when free electrons moving through the wire collide with atoms, causing them to lose some of their energy as heat. This resistance slows down the flow of electrons and results in the wire heating up. The resistance is measured in ohms and is influenced by the material of the wire, its length, and its cross-sectional area.
If both the diameter of wire and its length were quadrupled what will happen to its resistance?
If both the diameter and length of a wire are quadrupled, the resistance of the wire will increase by a factor of 16. This is because resistance is directly proportional to the length of the wire and inversely proportional to the cross-sectional area of the wire, which is determined by the diameter. By quadrupling both, the resistance will increase by 4^2 = 16 times.
What will happen to the current if double the length of the wire?
If you double the length of the wire while keeping the resistance constant, the current will halve because resistance is directly proportional to the length of the wire. This is described by Ohm's law (V = I * R), where V is voltage, I is current, and R is resistance.
What happens to resistance of the wire if the wire is short?
If the wire is short, its resistance will likely decrease. A shorter wire has less length for electrons to travel through, resulting in lower resistance according to the formula R = ρL/A, where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area.
Why the temp of metallic wire rises when a current passes through it?
When current is passed through the wire, the negatively charged electrons (Current) face resistance as the molecules of the conductor block their way. These moving electrons collide with the molecules of the conductor and heat is produced which heats up the metallic wire.
How does resistance happen in a wire?
Resistance in a wire occurs when free electrons moving through the wire collide with atoms, causing them to lose some of their energy as heat. This resistance slows down the flow of electrons and results in the wire heating up. The resistance is measured in ohms and is influenced by the material of the wire, its length, and its cross-sectional area.
If both the diameter of wire and its length were quadrupled what will happen to its resistance?
If both the diameter and length of a wire are quadrupled, the resistance of the wire will increase by a factor of 16. This is because resistance is directly proportional to the length of the wire and inversely proportional to the cross-sectional area of the wire, which is determined by the diameter. By quadrupling both, the resistance will increase by 4^2 = 16 times.
What will happen to the current if double the length of the wire?
If you double the length of the wire while keeping the resistance constant, the current will halve because resistance is directly proportional to the length of the wire. This is described by Ohm's law (V = I * R), where V is voltage, I is current, and R is resistance.
Suppose a wire of resistance R could be stretched uniformly until it was twice its original length. What would happen to its resistance?
Current tends to travel on the surface of the wire. As you decrease the cross-sectional area of a wire the resistance increases. That is why larger wires are rated for higher currents.
On what does conductivity in a metallic wire depend?
Conductivity in a metallic wire depends on factors such as the type of metal, its purity, temperature, and the presence of impurities. Metals with higher electron mobility and lower resistance exhibit higher conductivity. Additionally, increasing the cross-sectional area of the wire can also enhance conductivity.
Four factors that determine resistance of an object?
Length, cross section, material, temperature.AnswerWithout wishing to sound pedantic, there are only threefactors that affect resistance. These are the length, cross-sectional area, and resistivity of a material. Temperature affects resistivity.
What happens to resistance of the wire if the wire is short?
If the wire is short, its resistance will likely decrease. A shorter wire has less length for electrons to travel through, resulting in lower resistance according to the formula R = ρL/A, where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area.
What will you need to measure to find out which wire has the greatest resistance?
To find out which wire has the greatest resistance, you will need to measure the resistance of each wire using a multimeter. Connect the multimeter to each wire separately and record the resistance values displayed. The wire with the highest resistance value will have the greatest resistance.
How does length affect resistance of a wire?
In general, the longer the wire, the greater the resistance. This is because a longer wire offers more resistance to the flow of electrons compared to a shorter wire. The resistance of a wire is directly proportional to its length.
If you have a thick wire and small electricity what would happen?
the property of a wire to oppose the flow of current is called resistance and resistance is inversely proportional to A (area of cross-section of the wire). so, a small current also should be transferred without much loss.
How does the thickness of the wire affect resistance?
A thicker wire has less resistance than a thinner wire.
