The dielectric strength of air is 3.0 x 10^6V/m. A parallel-plate air-capacitor has area 20cm^2 and plate separation 0.10mm.

(c) : n plates connected alternately give rise to (n – 1) capacitors connected in parallel Therefore, Resultant capacitance = (n – 1)C.

The correct answer is (1) Ceq=(n−1) C ( all capacitors are in parallel)

The correct answer is (b)Q = Q 

The correct answer is (a) (c) (d) (a) the facing surfaces of the capacitor have equal and opposite charges.  (c) the battery supplies equal and opposite charges to the two plates. (d) the...

The correct answer is (b) (c) (b) potential difference across the capacitor (c) energy of the capacitor

(d) Equal and opposite charges will appear on the two faces of the metal plate.

(d) deflects and gradually comes to the original position in a time which is large compared'to the time constant.

(i) The capacitance of capacitor increases to K times (since C = (Kε0A)/d ∝ K) (ii) The potential difference between the plates becomes 1/K times. Reason: V = Q/C;Q same, increases to K times ∴...

(i) The charge Q =CV, V = same, C = increases; there, charge on plates increases.  (ii) A electric field E  = V/d, and V = constant, d = constant; therefore, electric...

C will decrease Energy stored =1/2CV2 and hence will increase. Electric field will increase. Charge stored will remain the same. V will increase.