文档介绍：Chapter 1, Problem 1
How many coulombs are represented by these amounts of electrons:
(a) × 17 (b) × 18
(c) × 19 (d) × 20
Chapter 1, Solution 1
17 -19
(a) q = x [- C] = - C
18 -19
(b) q = 1. 24x10 x [- C] = - C
19 -19
(c) q = x [- C] = - C
20 -19
(d) q = x [- C] = - C
Chapter 1, Problem 2.
Determine the current flowing through an element if the charge flow is given by
(a) () (ttq += 83 ) mC
(b) () 2 += t-t(tq 2)48 C
(c) () ( −= e5e3tq − t2-t ) nC
(d) ()tq = sin10 120π pCt
(e) ()= etq −4t 50cos20 μCt
Chapter 1, Solution 2
(a) i = dq/dt = 3 mA
(b) i = dq/dt = (16t + 4) A
(c) i = dq/dt = (-3e-t + 10e-2t) nA
(d) i=dq/dt = 1200π cos 120π t pA
(e) i =dq/dt = −+et− t4 (cos80 50 1000 sin) 50 t μ A
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Chapter 1, Problem 3.
Find the charge q(t) flowing through a device if the current is:
(a) ()A,3 qti ( )== C10
(b) += qtti = 0)0(,mA)52()(
(c) ti = t + πμA,)6/10cos(20)( q = 2(0) μ C
(d) ()= −30t A,40sin10 qteti = 0(0)
Chapter 1, Solution 3
(a) q(t) ∫ q(0)i(t)dt +=+= 1)(3t C
(b) ∫ s)(2tq(t) q(v)dt 2 +=++= 5t)(t mC
(c) q(t)=++=++∫ 20 cos () 10tπ/ 6 q(0) (2sin(10t πμ/ 6) 1) C
e10 -30t
= 30t- q(0)t40sin10eq(t) =+ − 40-t40sin30( t)cos
(d) ∫+ 1600900
−= e 30t- + ( sin 40t) C
Chapter 1, Problem 4.
A current of A flows through a conductor. Calculate h