To solve the problem, we need to identify the term used for a piece of information shown in a graph that is assigned to the data series.
1. Understanding the Components:
2. Analyzing the Question:
The question states that it is a piece of information assigned to the data series and shown in a graph. This best describes a data point, which is the actual graphical representation of the value in the chart.
Final Answer:
Correct Option: (A) data point
A battery of emf \( E \) and internal resistance \( r \) is connected to a rheostat. When a current of 2A is drawn from the battery, the potential difference across the rheostat is 5V. The potential difference becomes 4V when a current of 4A is drawn from the battery. Calculate the value of \( E \) and \( r \).