If a fuse wire of certain material blows at 10 A current, then what should be the radius of the fuse wire made from same material which blows at 20 A ?

Explanation

To find the radius of a fuse wire that blows at 20 A, given that a fuse wire of the same material blows at 10 A, we can follow these steps:

### Step 1: Understand the relationship between current, resistance, and heat generation
The heat generated in a wire is given by the formula:
\[ P = I^2 R \]
where \( P \) is the power (heat energy per unit time), \( I \) is the current, and \( R \) is the resistance of the wire.

### Step 2: Write the expression for resistance
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