Two resistors are said to be in ...A,.., if only one of their end points is joined. Here, A refers to

Options

A. parallel
B. series
C. Both of the above
D. None of the above

Answer

To solve the question, we need to determine the type of connection between two resistors when only one of their endpoints is joined. The answer to the question is that the two resistors are said to be in **series**.

### Step-by-Step Solution:

1. **Understanding Resistor Connections**:
- Resistors can be connected in two primary ways: series and parallel.
- In a series connection, the resistors are connected end-to-end, so the same current flows through each resistor.
- In a parallel connection, the resistors are connected across the same two points, so the voltage across each resistor is the same.

2. **Analyzing the Given Condition**:
- The question states that "only one of their endpoints is joined." This means that the resistors share one common point while their other endpoints remain separate.

3. **Visualizing the Connection**:
- Let's denote the two resistors as R1 and R2.
- If we connect R1 and R2 such that one end of R1 is connected to one end of R2 (say point B), and the other ends (point A for R1 and point C for R2) are not connected, we have:
- R1 connected from point A to point B
- R2 connected from point B to point C

4. **Determining the Type of Connection**:
- Since the resistors share a common endpoint (point B) and the current flowing through R1 must also flow through R2 (as there are no other paths), this configuration means that the same current flows through both resistors.
- Therefore, this configuration is a **series connection**.

5. **Conclusion**:
- Based on the analysis, when only one endpoint of two resistors is joined, they are said to be in **series**.

### Final Answer:
The two resistors are said to be in **series** if only one of their endpoints is joined.