A). A square shaped ( 4.5 mm by 4.5 mm) metal rod has resistance of 1.19 ohm. Th

Question

Explanation / Answer

here,

A)

area of the rod , a = 4.5^2 * 10^-6 m

resistance , r = 1.19 ohm

resistivity , p = 0.5 * 1.19 * 10^-6 ohm m

let the length of rod be l

p*l/a = r

0.5 * 1.19* 10^-6 * l/( 4.5^2 * 10^-6) = 1.19

l = 40.5 m

length of rod is 40.5 m

B)

sepration between the plates , d = 8.85 * 10^-3 m

capacitance , C = 50 * 10^-9 F

k = 2.2

let the area of each plate be a

k * epsilon0 * a /d = C

2.2 * 8.85 * 10^-12 * a /( 8.85 * 10^-3) = 50 * 10^-9

a = 22.73 m^2

the area of each plate is 22.73 m^2

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.