1. You are given a conductor and a sub-conductor. How do you differentiate between the two by applying Ohm's law?1. You are given a conductor and a sub-conductor. How do you differentiate between the two by applying Ohm's law?
Answers
Answer:
Ohm's law is the relationship between potential difference across a conductor and the current flowing through it.
Ohm's law states that "The current flowing through a conductor is directly proportional to the potential difference between its ends provided its temperature remains constant.
That is, V∝IorR=
I
V
where R is a constant called resistance for a given metallic wire at a given temperature.
Experiment to verify ohm's law:
The circuit is set up as shown in the diagram below. Firstly, one cell is used and the current (I) is noted in the ammeter and the potential difference (V) in the voltmeter across the wire AB. Now, two cells, three cells and four cells are used and the observation is repeated. The readings in the ammeter and voltmeter are noted down for each repetition.
A graph is plotted between the current (I) and potential difference (V). The graph will be a straight line. This shows that the current flowing through a conductor is directly proportional to the potential difference across its ends.
That is, V∝IorI∝VandR=
I
V
where R is the resistance of the metallic wire.
This proves for the ohm's law.
solution
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