Given:
Initial voltage across the plates, \( V_0 = 60 \, V \)
Voltage across the plates with dielectric, \( V = 12.5 \, V \)
The dielectric constant, \( K \), can be calculated using the formula:
\[ K = \frac{V_0}{V} = \frac{60}{12.5} = 4.8 \]
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