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Which one of the following physical quantities does NOT affect the resistance of a cylinder resistor?
- a)the current through it
- b)its length
- c)the resistivity of the material used in the resistor
- d)the area of cross-section of the cylinder
Correct answer is option 'A'. Can you explain this answer?
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Which one of the following physical quantities does NOT affect the res...
Resistance of a cylinder resistor is a property that determines the opposition to the flow of electric current through it. Several physical quantities can affect the resistance of a cylinder resistor, but the one that does NOT affect it is the current through it (option A).
Explanation:
1. Current through the resistor:
The current passing through a resistor is the flow of electric charge per unit time. However, the current does not directly affect the resistance of a resistor. The resistance of a resistor is determined by its physical properties and is independent of the current flowing through it.
2. Length of the resistor:
The length of a cylinder resistor does affect its resistance. As the length of the resistor increases, the resistance also increases. This is because the longer the path the electric current has to travel, the more collisions it will experience with the atoms of the resistor material, resulting in increased resistance.
3. Resistivity of the material used:
The resistivity of the material used in the resistor does affect its resistance. Resistivity is a material property that determines how strongly a material opposes the flow of electric current. Materials with higher resistivity offer more resistance to the flow of current.
4. Area of cross-section of the cylinder:
The area of cross-section of the cylinder resistor also affects its resistance. A larger cross-sectional area allows for more current to flow through, resulting in lower resistance. Conversely, a smaller cross-sectional area restricts the flow of current, leading to higher resistance.
In summary, the resistance of a cylinder resistor is not affected by the current passing through it. The resistance is determined by the length of the resistor, the resistivity of the material used, and the area of cross-section of the cylinder.
Explanation:
1. Current through the resistor:
The current passing through a resistor is the flow of electric charge per unit time. However, the current does not directly affect the resistance of a resistor. The resistance of a resistor is determined by its physical properties and is independent of the current flowing through it.
2. Length of the resistor:
The length of a cylinder resistor does affect its resistance. As the length of the resistor increases, the resistance also increases. This is because the longer the path the electric current has to travel, the more collisions it will experience with the atoms of the resistor material, resulting in increased resistance.
3. Resistivity of the material used:
The resistivity of the material used in the resistor does affect its resistance. Resistivity is a material property that determines how strongly a material opposes the flow of electric current. Materials with higher resistivity offer more resistance to the flow of current.
4. Area of cross-section of the cylinder:
The area of cross-section of the cylinder resistor also affects its resistance. A larger cross-sectional area allows for more current to flow through, resulting in lower resistance. Conversely, a smaller cross-sectional area restricts the flow of current, leading to higher resistance.
In summary, the resistance of a cylinder resistor is not affected by the current passing through it. The resistance is determined by the length of the resistor, the resistivity of the material used, and the area of cross-section of the cylinder.
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Community Answer
Which one of the following physical quantities does NOT affect the res...
Resistance doesn't vary with resisitivity
Resisitivity is the property of the material
Resisitivity is the property of the material
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Which one of the following physical quantities does NOT affect the resistance of a cylinder resistor?a)the current through itb)its lengthc)the resistivity of the material used in the resistord)the area of cross-section of the cylinderCorrect answer is option 'A'. Can you explain this answer?
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