A resistance R of therimal coefficient of resistivity `alpha` is connected in parallel with a resistance 3R. Having thermal coeffiecinet of resistivity `2alpha` Find the value of `alpha_(eff)`

Explanation

To solve the problem step by step, we need to find the effective thermal coefficient of resistivity (α_eff) for two resistors connected in parallel.

### Step 1: Identify the resistances and their thermal coefficients
- Let R1 = R with thermal coefficient of resistivity α.
- Let R2 = 3R with thermal coefficient of resistivity 2α.

### Step 2: Calculate the equivalent resistance (R_eq) of the parallel combination
Using the formula for resistors in parallel:
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