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If a wire follows Ohm's Law, what type of graph is obtained when potential difference (V) is plotted against current (I)?
- a)A curved line
- b)A straight line passing through the origin
- c)A horizontal line
- d)A vertical line
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
If a wire follows Ohms Law, what type of graph is obtained when potent...
Understanding Ohm's Law
Ohm's Law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points, provided the temperature remains constant. Mathematically, it is expressed as:
V = I * R
where R is the resistance.
Graphical Representation
When you plot the potential difference (V) against the current (I):
- Type of Graph: The graph results in a straight line.
Key Points about the Graph
- Straight Line: The linear nature indicates that as current increases, voltage also increases proportionally.
- Passes Through the Origin: The straight line intersects the origin (0,0). This signifies that when there is no current (I=0), there is also no voltage (V=0).
- Slope Represents Resistance: The slope of the line represents the resistance (R) of the wire. A steeper slope indicates higher resistance.
Conclusion
The straight line passing through the origin confirms that the wire obeys Ohm's Law, demonstrating a consistent relationship between voltage and current. Thus, option 'B' is indeed the correct answer.
Ohm's Law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points, provided the temperature remains constant. Mathematically, it is expressed as:
V = I * R
where R is the resistance.
Graphical Representation
When you plot the potential difference (V) against the current (I):
- Type of Graph: The graph results in a straight line.
Key Points about the Graph
- Straight Line: The linear nature indicates that as current increases, voltage also increases proportionally.
- Passes Through the Origin: The straight line intersects the origin (0,0). This signifies that when there is no current (I=0), there is also no voltage (V=0).
- Slope Represents Resistance: The slope of the line represents the resistance (R) of the wire. A steeper slope indicates higher resistance.
Conclusion
The straight line passing through the origin confirms that the wire obeys Ohm's Law, demonstrating a consistent relationship between voltage and current. Thus, option 'B' is indeed the correct answer.
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If a wire follows Ohms Law, what type of graph is obtained when potent...
The V-I graph for an ohmic conductor is a straight line that passes through the origin, showing a direct proportionality between voltage and current.
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