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प्रश्न
What are non-ohmic conductors? Give one exmaple. Draw a current-voltage graph for a non-ohmic conductor.
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उत्तर
The conductors which do not obey Ohm’s law (i.e., V/I is not constant) are called non-ohmic conductors.
Example: Diode valve.
The current-voltage graph for a non-ohmic conductor is shown in figure alongside.
संबंधित प्रश्न
The graph between V and I for a conductor is a straight line passing through the origin.
- Which law is illustrated by such a graph?
- What should remain constant in a statement of this law?
Fill in the following blank with suitable words:
Resistance is measured in .............. The resistance of a wire increases as the length ..............; as the temperature ..............; and as the cross-sectional area .............. .
How should the two resistances of 2 ohms each be connected so as to produce an equivalent resistance of 1 ohm?
An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.
State the relation correlating the electric current flowing in a conductor and the voltage applied across it. Also, draw a graph to show this relationship.
State the limitations of Ohm’s law.
Draw a neat diagram for the verification of Ohm’s law by voltmeter-ammeter method. By another diagram show the relation between p.d. and current.
The ratio of the potential difference to the current is known as ________.
The temperature of a conductor is increased. The graph best showing the variation of its resistance is:
How is electric current related to the potential difference across the terminals of a conductor?
Draw a labelled circuit diagram to verify this relationship.
