An isolated parallel plate capacitor contains charge Q = +10 ?C on its plates, c
ID: 2274670 • Letter: A
Question
An isolated parallel plate capacitor contains charge Q = +10 ?C on its plates, corresponding to a potential difference of 10 V. The initial separation between the plates is d. Later, the distance between the plates is increased by a factor of two while the charge on each plate remains unchanged. What is the capacitance after the separation becomes 2d?
An isolated parallel plate capacitor contains charge Q = +10 ?C on its plates, corresponding to a potential difference of 10 V. The separation between the plates is d = 0.2 cm. What is the capacitance of this parallel plate capacitor if there is only air between its plates?
An isolated parallel plate capacitor contains charge Q = +10 ?C on its plates, corresponding to a potential difference of 10 V. The initial separation between the plates is d = 0.2 cm. What happens to the capacitance of this parallel plate capacitor if the charge is doubled?
A. C
B. 2C
C. 4C
D. C/2
E. C/4
Explanation / Answer
C is inversely proportional to d.If the separation is 2d the capacitance isC/2 option D is correct.
Q=KCV.Q=10 and V=10 and dielectric constant K is 1.So C=1farad.option B is correct.
the capacitance is not dependant on the charge of the plates .option B is correct.
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