While performing ohm’s law activity, Rhea was noting down observations. She had to leave the class for some time without switching off or dismantling the connections. When she returns should she continue taking readings with the same connections? Justify your answer.
Answers
Answer:
Ohm’s Law: If the physical conditions such as temperature, pressure, mechanical strain, etc., remain the same, the current (I) flowing through a conductor is directly proportional to the potential difference (V) across the conductor. Mathematically,
I ∝V or V∝ I or V=IR or R=V/I
The proportionality constant R is called the resistance offered by the conductor to the flow of electric current. If a graph is plotted between the current (I) flows through the conductor and the applied potential difference (V) between its ends, it will be a straight line as shown.
CBSE Class 10 Science Practical Skills – Ohm’s Law 5
The graph shows that the current through conductor increases linearly as the potential difference across it increases.