Wire bound resistors are made by

Options

A. winding the wires of an alloy viz, Cu,Al,Ag
B. winding the wires of an alloy viz, Si,Tu,Fe
C. winding the wires of an alloy viz, Ge,Au,Gr
D. winding the wires of an alloy viz,magnesium, constantan, nichrome

Explanation

To answer the question "Wire bound resistors are made by," we can break down the solution into the following steps:

### Step 1: Identify the Types of Resistors
Wire bound resistors are one of the two main types of resistors, the other being carbon resistors.

**Hint:** Remember that resistors can be categorized based on their construction materials.

### Step 2: Understand Wire Bound Resistors
Wire bound resistors consist of a wire wound in the form of a coil. This design is crucial for their functionality.

**Hint:** Think about how the physical structure of a resistor affects its electrical properties.

### Step 3: Determine the Materials Used
The wires used in wire bound resistors are typically made from specific alloys. Common alloys used include:
- Manganin
- Nichrome
- Constantan

**Hint:** Consider why certain materials are preferred for making resistors, especially in terms of their electrical properties.

### Step 4: Explain the Choice of Alloys
Alloys are chosen for wire bound resistors because they have a resistivity that is largely insensitive to temperature changes. This means that the resistance remains stable even when the temperature fluctuates.

**Hint:** Reflect on the importance of temperature stability in electrical components.

### Step 5: Discuss the Resistance Values
Wire bound resistors usually have resistance values that are either very small (in fractions of ohms) or a few hundred ohms. This range is suitable for various applications.

**Hint:** Think about how resistance values can affect the performance of electrical circuits.

### Final Answer
Wire bound resistors are made from alloys such as manganin, nichrome, and constantan. These materials are selected due to their temperature stability and suitable resistivity, allowing for consistent performance across a range of temperatures.