Solution Homework fundamental of physics, Cheat Sheet of Electrical Circuit Analysis

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TUGAS FISIKA DASAR III

Nama : I Gusti Agung Anom Widyartha

NIM : 2108521022

Kelas

Program Studi Fisika

Fakultas Matematika dan Ilmu Pengetahuan Alam

Universitas Udayana

1. During the 4.0 min a 5.0 A current is set up in a wire, how many (a) coulombs and (b)

electrons pass through any cross sec-tion across the wire’s width? Diketahui : I = 5.0 A t = 4.0 min = 60 x 4 = 240 s Ditanya : a. Q = …? b. N = …? Jawab : a. 𝐼 = 𝑄𝑡 𝑄 = 𝐼. 𝑡 𝑄 = 5 𝑥 240 = 1,2 𝑥 10^3 𝐶 b. Menurut quantitas muatan 𝑄 = 𝑁𝑒

𝑁 =

Dimana e adalah besarnya muatan electron, e = 1.6 x 10-19^ C

𝑁 =

1,2 𝑥 10^3

1,6 x 10− 𝑁 = 7,5 𝑥 10^21 𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛𝑠

2. In Fig. 27-26, the ideal batteries have emfs ε1 = 150 V and ε2 = 50 V and the resistances

are R1 = 3.0 Ω and R2 = 2.0 Ω. If the potential at P is 100 V, what is it at Q?

Diketahui : ε1 = 150 V