The plates of parallel plate capacitor are separated by a solid dielectric. This capacitor and a resistor are connected in series across the terminals of a battery. Now the plates of the capacitor are pulled slightly farther apart. When equilibrium is restored in the circuit, Choose wrong option(s).
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a
The potential difference across the plates has increased
b
The energy stored in the capacitor has increased
c
The capacitance of the capacitor has increased
d
The charge on the plates of the capacitor has decreased
answer is A.
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Detailed Solution
C=εAd⇒C∝1dAs ‘d’ increases, C decreases.Since, same battery is still connected, potential difference across capacitor remains same.q=CVAs ‘C’ decreases , q also decreasesU=12CV2As ‘C’ decreases , U also decreases.
The plates of parallel plate capacitor are separated by a solid dielectric. This capacitor and a resistor are connected in series across the terminals of a battery. Now the plates of the capacitor are pulled slightly farther apart. When equilibrium is restored in the circuit, Choose wrong option(s).