Equation (31.9) says that υ ab = L di / dt (see Fig. 31.8a). Using Faraday’s law, explain why point a is at higher potential than point b when i is in the direction shown in Fig. 31.8a and is increasing in magnitude. When i is counterclockwise and decreasing in magnitude, is υ ab = L di/dt still correct, or should it be υ ab = − L di / dt ? Is υ ab = L di / dt still correct when i is clockwise and increasing or decreasing in magnitude? Explain.
Equation (31.9) says that υ ab = L di / dt (see Fig. 31.8a). Using Faraday’s law, explain why point a is at higher potential than point b when i is in the direction shown in Fig. 31.8a and is increasing in magnitude. When i is counterclockwise and decreasing in magnitude, is υ ab = L di/dt still correct, or should it be υ ab = − L di / dt ? Is υ ab = L di / dt still correct when i is clockwise and increasing or decreasing in magnitude? Explain.
Equation (31.9) says that υab = L di/dt (see Fig. 31.8a). Using Faraday’s law, explain why point a is at higher potential than point b when i is in the direction shown in Fig. 31.8a and is increasing in magnitude. When i is counterclockwise and decreasing in magnitude, is υab = L di/dt still correct, or should it be υab = −L di/dt? Is υab = L di/dt still correct when i is clockwise and increasing or decreasing in magnitude? Explain.
At t = 0 the switch S is closed with the capacitor uncharged. If C = 30 µF, E = 50 V, and R= 10
k2, what is the potential difference across the capacitor when I= 3 mA?
30 Ω
I,
40 2
I3
1Ω
E2 = 45 V.
a
C
I2
E = 85 V 10
%3D
f
e
ple 9: calculate the 3 unknowns (I,, I, and I)
20
The switch in the given figure has been in position A for a long time. Assume the switch moves instantaneously from A to B at
t= 0. Find v for t> 0. Assume R = 4 kN.
5 kΩ Α
B
10 μF
40 V
R
The voltage v(t)
v(0) e-1/ , where v(0)
V and T=
S.
Chapter 31 Solutions
University Physics with Modern Physics, Books a la Carte Edition; Modified MasteringPhysics with Pearson eText -- ValuePack Access Card -- for ... eText -- Valuepack Access Card (14th Edition)
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