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What is the electrical resistance of a penny?
The electrical resistance of a penny can vary based on its composition and condition, but a typical copper penny (post-1982) has a resistance of about 1 to 2 ohms. This value can change due to factors like oxidation, surface condition, and temperature. Generally, the resistance is low due to copper's excellent conductivity.
Why is copper preferred for the windings in a transformer?
Copper has a relatively low resistance, is malleable and easily formed, and it is relatively inexpensive compared to other metals, such as silver, that are also good conductors.
Do conductors have high or low current?
Low resistance. Think of Ohm's law. Voltage drop is directly proportional to resistance. The higher the resistance, the higher the voltage drop, and the less voltage that is available for the load. Think of conductor resistance as a resistance in series with the load. Also, higher conductor resistance means more power lost, going to heating the conductors. The "line loss" formula is P=I2R. The greater the resistance, the greater the electrical power being converted into thermal power heating the conductors.
Items that use low resistance wire?
Ni chrome is a low resistance wire used in heaters and toasters.
What are the disadvantages of low carbon steel?
Abrasion resistance is low.
Is copper low or high resistance?
Copper is known for its low electrical resistance, making it a highly conductive material. This property of copper makes it ideal for use in electrical wiring and other applications where efficient electrical conductivity is required.
What kind of marterials have low resistance?
the best conductors with low resistance are silver, copper, gold, aluminum (best to least best)
What are some examples of items with low conductivity?
Thermal resistance: diamond Electrical resistance: copper Optical resistance: quartz
Why copper strips are used in meter bridge wire?
Copper strips are used in a meter bridge wire due to their excellent conductivity, which allows for accurate measurement of resistance in the wire. The low resistance of copper helps minimize any potential measurement errors caused by the resistance of the connecting wires.
What is materials with low resistance called?
Materials with low resistance are called conductors. Conductors allow electricity to flow easily through them due to their low resistance. Metals such as copper and aluminum are examples of good conductors.
Which wire would have the lowest resistance a long thin iron wire at a high temperature or a short thick copper wire at a low temperature?
The short thick copper wire at a low temperature would have the lowest resistance. Copper has lower electrical resistance than iron, and a shorter, thicker wire has lower resistance compared to a long thin wire, regardless of the temperature.
What is a material that has low resistance?
what is the property that makes it harder for charge to pass through
How much resistance do conductors have?
Conductors have low resistance to the flow of electric current. The resistance of a conductor depends on its material, length, and cross-sectional area. Materials like copper and silver have low resistance, making them good conductors of electricity.
Why is a copper wire not used to make filaments of electricbulbs?
Copper wire has low resistance, so it is unable to produce enough heat to glow.
Can copper and alluminium wire of same length and diameter have same resistance?
No, copper and aluminum wire of the same length and diameter will not have the same resistance. Copper has a lower resistivity than aluminum, so a copper wire will have lower resistance compared to an aluminum wire of the same length and diameter.
Why is copper wire not used in potentiometer?
Copper wire is not used in potentiometers because copper is highly conductive and would not provide enough resistance for the potentiometer to function properly. Instead, materials with higher resistance, such as nichrome or a graphite-based material, are used to create the variable resistance needed in a potentiometer.
What has a lower resistance a long thin iron wire at high temp or a short thick copper wire at low temp?
A short thick copper wire at low temperature would have lower resistance compared to a long thin iron wire at high temperature. This is because resistance is inversely proportional to cross-sectional area and directly proportional to temperature and length of the wire. The short thick copper wire has a larger cross-sectional area, which results in lower resistance.
