4. Determine the capacitance of: (a) a 1-ft length of 35B/U coaxial cable, which has an inner conductor 0.1045 in. in diameter, a polyethylene dielectric (r= 2.26), and an outer conductor that has an inner diameter of 0.680 in.; D₁=0.1645 in D₂=0.680 in L = 12 in or 1ft (b) a conducting sphere of radius 2.5 mm, covered with a polyethylene layer 2 mm thick, surrounded by a conducting sphere of radius 4.5 mm; .5mm √₂-9.5mm (c) two rectangular conducting plates, 1 cm by 4 cm, with negligible thickness, between which are three sheets of dielectric, each 1 cm by 4 cm, and 0.1 mm thick, having dielectric constants of 1.5, 2.5, and 6. 0-14M/ Icm (48₂) et mal 2-5 0.1mm {1 6 Ans. 20.5 pF; 1.41 pF; 28.7 pF
4. Determine the capacitance of: (a) a 1-ft length of 35B/U coaxial cable, which has an inner conductor 0.1045 in. in diameter, a polyethylene dielectric (r= 2.26), and an outer conductor that has an inner diameter of 0.680 in.; D₁=0.1645 in D₂=0.680 in L = 12 in or 1ft (b) a conducting sphere of radius 2.5 mm, covered with a polyethylene layer 2 mm thick, surrounded by a conducting sphere of radius 4.5 mm; .5mm √₂-9.5mm (c) two rectangular conducting plates, 1 cm by 4 cm, with negligible thickness, between which are three sheets of dielectric, each 1 cm by 4 cm, and 0.1 mm thick, having dielectric constants of 1.5, 2.5, and 6. 0-14M/ Icm (48₂) et mal 2-5 0.1mm {1 6 Ans. 20.5 pF; 1.41 pF; 28.7 pF
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Solve for item A, B and C. answers of the three questions are provided below.
Transcribed Image Text:Capacitance
4. Determine the capacitance of:
(a) a 1-ft length of 35B/U coaxial cable, which has an inner conductor 0.1045 in. in diameter, a
polyethylene dielectric ( r = 2.26), and an outer conductor that has an inner diameter of 0.680
in.;
D₁ = 0.1645 in
D₂=0.680 in
L = 12 in or 1ft
(b) a conducting sphere of radius 2.5 mm, covered with a polyethylene layer 2 mm thick,
surrounded by a conducting sphere of radius 4.5 mm;
√₂=4.5mm
(c) two rectangular conducting plates, 1 cm by 4 cm, with negligible thickness, between which
are three sheets of dielectric, each 1 cm by 4 cm, and 0.1 mm thick, having dielectric constants
of 1.5, 2.5, and 6.
0.1AM {
Icm
1.5
at man d
2-5
6
Ans. 20.5 pF; 1.41 pF; 28.7 pF
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