Q. 93.7( 42 Votes )

# Explain what woul

Answer :

(a) When the voltage supply remains connected:

The capacitance of the capacitor will become K times.

Therefore, C’ = kC

Where k = dielectric constant = 6 × 17.7pF = 106.2 pF

The potential difference across the two plates of the capacitor will remain equal to the supply voltage i.e. 100 V

The charge on the capacitor,

q’ = C’V = 160.2 x 10^{-12} x 100

= 1.602 x 10^{-8} C

(b) After the voltage supply is disconnected:

As calculated above, the capacitance of the capacitor, C’ = 106.2 pF

The potential difference will decrease on introducing mica sheet by a factor of K,

⇒

The charge on the capacitor,

q’ = C’V’ = 106.2 × 10^{-12} × 16.67

q’ = 1.77 x 10^{-9} C

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