A wire of resistance 3 ohm and length 10 cm is stretched to length 30 cm. Assuming that it has a uniform cross section, what will be its new resistance ?

Explanation

To find the new resistance of the wire after it has been stretched, we can follow these steps:

### Step 1: Understand the relationship between resistance, length, and area.
The resistance \( R \) of a wire is given by the formula:
\[ R = \frac{\rho \cdot l}{A} \]
where:
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