1. What is Temperature Coefficient of Resistor?

The Temperature Coefficient of Resistance (TCR) describes how much a resistor's value changes as its temperature changes. It's typically expressed in parts per million per degree Celsius (ppm/°C).

2. How Does the Calculator Work?

The calculator uses the TCR formula:

Where:

• \( R1 \) — Resistance at temperature T1 (ohms)
• \( R2 \) — Resistance at temperature T2 (ohms)
• \( T1 \) — Initial temperature (°C)
• \( T2 \) — Final temperature (°C)

Explanation: The formula calculates the relative change in resistance per degree of temperature change.

3. Importance of TCR Calculation

Details: TCR is crucial for applications where temperature stability is important, such as precision circuits, measurement equipment, and temperature sensors.

4. Using the Calculator

Tips: Enter resistance values in ohms and temperatures in Celsius. Ensure T1 and T2 are different to avoid division by zero.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical TCR value for resistors?
A: Standard resistors might have ±100-200 ppm/°C, while precision resistors can be as low as ±5 ppm/°C.

Q2: Can TCR be negative?
A: Yes, some materials (like thermistors) have negative TCR where resistance decreases with temperature.

Q3: Why is TCR important in circuit design?
A: TCR affects circuit stability over temperature ranges, critical for precision applications.

Q4: How accurate is this calculation?
A: This assumes linear TCR. Some materials may have non-linear characteristics over wide ranges.

Q5: What units are used for TCR?
A: Typically ppm/°C (parts per million per degree Celsius) or %/°C.