Unit-2. Electrostatics ( CO-2)

Part A: Give answers in short. (1 or 2 marks)

Electric field, Electric potential, Electric potential difference, Electric flux, Capacitor and capacitance

(1) Two charges with value of 20 µC and 10 µC are separated 0.02 m distance in air. Find electric force or coulomb force between these charges. K value is 9 × 10 9 N m 2 / C 2 .
(2) 1600 Joule of work is done in moving a charge 25 coulomb from one point to the other. Calculate the potential difference between the points.
(3) A capacitor gets a charge 60 µC when it is connected to a battery of e.m.f. 12 V. Calculate the capacitance of the capacitor.
(4) Three capacitors of 10µF are connected in series and parallel connections in circuit. find out total capacitance in both cases.
(5) plat area of one parallel plat capacitor is 10 mm 2 , which are separated with 1mm distance in air.

Calculate capacitance of capacitor.

(6) The distance between the plats is 1mm, if we want to get capacitance of 1F, how much of area of plat should be?
(7) As per the below circuit, calculate total capacitance value.