Find the electric field between two metal plates 3 mm- apart connected to 12 V battery.

An electron is projected with an initial velocity of 10^(7)ms^(-1) into an electric field between two parallel plates 1 cm apart. The electron enters the field at a point midway between the plates. If the electron just misses the positivity charged plate as it emerges from the field, find the magnnitude of the electric density between the plates. (Length of each plate is 2 cm, mass of electron= 9xx10^(-31) kg and charge of electron =1.6xx10^(-19) C)

A parallel plate air capacitor is made using two plates 0.2 m square , spaced 1 cm apart . It is connected to a 50V battery. (a) what is the capacitance ? (b) what is the charge one each plane ? (c) what is energy stored in the capacitor ? (d) what is the electric field between the plates ? (e) If the battery is disconnected and then the plates are pulled apart to a separation of 2 cm , what are the answer to the above parts ?

A parallel plate capacitor has plate A and separation d between the plates. The capacitor is connected to a battery of emf V . (a) find the charge on the capacitor. (b) the plate separation is decreases to d//2 . Find the extra charge given by the battery to the positive plate. (c) work done in reducing separation between plates.

A parallel plate air filled capacitor having area 40 cm^2 and plate spacing 1.0 mm is charged to a potential difference of 500V. Find (a) the capacitance, (b) the magnitude of the charge on each plate ( c) the stored energy, (d) the electric field between the plates and (e ) the energy density between the plates.

A parallel plate capacitor is charged by connecting it to a battery. The battery is disconnected and the plates of the capacitor are pulled apart to make the separation between the plates twice. Again the capacitor is connected to the battery (with same polarity) then the potential difference between the plates increases when the plates are pulled apart (yes or not)

A parallel -plate capacitor having plate area 25.0 cm^ and a separation 2.00 mm between the plates .the capacitor is connected to a bettery of 12.0 V.(a)find the charge on the capacitor .(b) the plate separation is decrerased to 1.00 mm. Find the extra charge given by the bettery to the positive plate.

An electron is fired through a region of crossed electric and magnetic field (0.05 T) . The electric field is formed between two plates separated by a distance of 2 mm having a P.D. of 125 V . The speed of the electron is