1.

The capacitance of a parallel capacitor is 5muF. When glass slab inserting between two plates, its potential difference becomes (1)/(8) the times hence the dielectric constant of a slab ......

Answer»

`1.6`
5
8
40

Solution :`C= (Q)/(V)` for air MEDIUM
` C = (Q)/(V)` for dielectric medium and C = KC
`:. (Q)/(V) = K (Q)/(V)`
`:. V = (V)/(K) `
`:. K = (V)/(V) ` but ` V = (V)/(8) :. K =8`


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