IF A SLAB OF INSULATING MATERIAL 4x10^(-3)m THICK IS INTRODUCED BETWEEN THE PLATES OF A PARALLEL PLATE CAPACITOR , THE SEPARATION BETWEEN PLATES HAS TO BE INCREASED BY 3.5x10^(-3)m TO RESTORE THE CAPACITY TO ORIGINAL VALUE.THE DIELECTRIC CONSTANT OF THE MATERIAL WILL BE -
1. 6
2. 8
3. 10
4. 12
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