1 . The units of capacitance are equivalent to: A) JC B) VIC C) J/C D) CJ E) C 2

Question

1 . The units of capacitance are equivalent to: A) JC B) VIC C) J/C D) CJ E) C 2. The capacitance of a parallel-plate capacitor can be increased by A) increasing the charge B) decreasing the charge C) increasing the plate separation D) decreasing the plate separation E) decreasing the plate area . A parallel-plate capacitor has a plate area of 0.2 m2 and a plate separation of 0.1 mm. If the charge on each plate has a magnitude of 4x 10 C the potential difference across the plates is approximately A) 0 V B) 4 x 102 v C)2×102 V D) 2 × 105 E) 4 x 10 v Each of the four capacitors shown is 500 pF. The voltmeter reads 1000V. The magnitude of the charge on each capacitor plate is: 4. A) 0.2 C B) 0.5 C c) 20 C D) 50 C E) none of these

Explanation / Answer

D because as capacitance c=charge /voltage as the charge is in coulombs and voltage is in joules D,as capacitance in parallel plate capacitor c=A€/d,so as decreasing the separation between the plates the capacity will be increased C;potential V=qd/A€substituting all values E

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