Choose the better answer: 8) A ring of radius = 1cm in the z = 0 plane has a cha
ID: 2084549 • Letter: C
Question
Choose the better answer:
8) A ring of radius = 1cm in the z = 0 plane has a charge density of 1C / m, determine the electric potential at z = 5cm.
a) 5 pV/m b) 5 pC c) 5nC d) 11kV e) 11 GV
9) Determine the magnitude of the electric flux density at (0,0,4m) given two load points of 5C in (3m, 0,0) and (-3m, 0,0).'
a) 12 nC/m2 b) 25 nC/m2 c) 32 nC/m2 d) 250 nC/m2 e) 32 mC/m2
10) Determine the work required to move two loads Q1 = 1mC and Q2 = -2mC from infinity to points (6, -2,1) and (3,2,0) respectively.
a) -3.6kJ b) -719J c) 1.4kJ d) 3.6kJ e) 7.2kJ
12) Determine the resistance along a resistor ( = 3x104 S / m) in the form of a hollow cylinder with internal radius of 3.5mm, external radius of 5mm and a length of 3cm.
a) 11 b) 22 c) 11 d) 22M e) 71M
13) In the two-media interface (r1 = 2.4, r2 = 4.5) the electric field in the medium 1 has the components E1t = 3.25 mV / m and E1n = -4.53mV / m. Determine E2n.
a) -20mN/C b) -11mN/C c) -7.8mV/m d) -4.5mV/m e) -2.4mV/m
14) For the above problem, determine D2t.
a) 29pC/m2 b) 40pC/m2 c) 130pC/m2 d) 240pC/m2 e) 15C/m2
15)The electric potential in a region is given by V = 6xy2z + 8. Find the component in x of the electric field, Ex, at the point (1,3, -4).
a) -216 b) -24 c) 0 d) 24 e) 216
Explanation / Answer
for this direct solutions for the problem is
8)a
9)b
10)d
11)b
12)a
13)c
14)b
15)b