Why is manganin thicker than copper?
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Why is manganin thicker than copper?
Two wire of equal lengths, one of copper and the other of manganin have the same resistance. Resistivity of Copper wire is less than that of the resistivity of magnanin wire. Therefore, the area of cross- section of copper wire is less than that of magnanin. Hence, Manganin wire is thicker.
Is two copper wire of different length will have the same resistance?
Resistance of a wire is directly proportional to the length (l) of the wire and inversely proportional to the area of cross-section of the wire. So, the thicker wire will have more specific resistance as resistivity is directly proportional to area of cross-section.
Which wire is thicker copper or Nichrome?
Answer: Nichrome has more resistivity than copper. Hence for equal length and resistance it has to to be thicker since resistance is inversely proportional to the diameter of the wire.
Which has more resistivity copper or manganin?
Answer: Manganin is an alloy of Cu with manganese and nickel. Since the latter two metals have resistivity greater than copper, the pure copper has lower resistivity and the manganin thus has to be thicker to have the same resistance.
Why Nichrome wire is heated first?
Among the two wires having similar length and radius, Nichrome wire gets heated up more as compared wire since resistivity of Nichrome is more than that of Copper. Also, Nichrome wire is a good conductor of current and have very less resistance, so it will heat sooner as compared to Copper.
Why is copper used for most electrical wiring?
Why is copper used for most electrical wiring? The lower the level of resistivity, the more electrical conductivity a metal has. And since copper wire has a low level of resistivity, it’s a fantastic electrical conductor. Copper is also an incredibly flexible material.
Which will have more resistivity?
Resistivity and Temperature Coefficient at 20 C
| Material | Resistivity ρ (ohm m) | Ref |
|---|---|---|
| Copper, annealed | 1.72 | 2 |
| Aluminum | 2.65 | 1 |
| Tungsten | 5.6 | 1 |
| Iron | 9.71 | 1 |
Which wire is longer manganin or copper?
copper wire is longer as it has a low resistivity.
Is manganin thicker than copper?
Two wires of equal length one of copper and other of manganin have the same resistance. Since ρ is grater for manganin than for copper, hence manganin wire is thicker than copper wire.