Question

1 Homework 1 Q1/ How much work is required to move a -50 C charge from an electric potential of –50 V to 250 V?, if the charge accelerates from rest, what is the final speed if it has a mass of 0.01 grams? Q2/ 100 C of charge is stored when 20 V is applied across a capacitor. (a) What voltage is required to store 300 C of charge? (b) How much charge can be stored if 150 V is applied?

Answer 1

81). Givenid q = -504C = -50x10-66 Change in electric Potential (AV) – Vs-V; =[250-6-50)v=300 V Required Work = q AV = -50 X 10 X300 = - 15x103 Joules And Now, mass of Charge (m) = 0.01 gm = 0.01 X 10° Kig. Let v'be final velocity of Charge = + 15 x 10-3 J > LX0.01% 10% X 10' -3 2 Ź mue? – 15x10 3 2 > 0.005 v² = 15 = √3000 15 v- = 54.77 m/s 0-005 Ans 82% Given : 8=1000 V=20V 100 5 far z C = 9 V 20 a). Istored = 3000 SOI 300 - 5 Veen - Vrea - 60v And b) 9-5 - 750C 150 Ang