current in each of the resistors? (f) In the limit that R3-→ , what are the new values of the current in each resistor in terms of I, the original current in the battery? 100 N 100 N a

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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Hi there! I am stuck on part f) of 40 in the photo. Can someone steer me in the right direction?
difference between points a and b.
and (b) the potential
outer
than T
25.0 V
10.0 N
10.0 N
44. @СА lig
a
socket at
of the twe
Lomu
20.0 N
end of th
5.00 N.
5.00 N
(a) Expla
cannot be
(c) Find t
circuit.
Figure P21.39
40. Four resistors are connected
to a battery as shown in Fig-
ure P21.40. The current in R1 = R
the battery is I, the battery lo
emf is ɛ, and the resistor i s 29orle
values are R = R, R, =
2R, R, = 4R, and R = 3R.
(a) Rank the resistors ac-
cording to the potential dif-
ference across them, from largest to smallest. Note any cases of
equal potential differences. (b) Determine the potential differ-
ence across each resistor in terms of Ɛ. (c) Rank the resistors
according to the current in them, from largest to smallest. Note
any cases of equal currents. (d) Determine the current in each
resistor in terms of I. (e) If R. is increased, what happens to the
current in each of the resistors? (f) In the limit that R3 → ∞,
what are the new values of
the current in each resistor
in terms of I, the original
current in the battery?
Section 21.8
Ro = 2R
Note: The cu
R4 = 3R
for some cire
R3 = 4R
45. W The a:
l ob gaol
1, I, and
Figure P21.40
RO
has ey
100 N
46. The follo-
100 N
a
41. W Three 100-0 resistors
100 N
are connected as shown
in Figure P21.41. The
Figure P21.41
Transcribed Image Text:difference between points a and b. and (b) the potential outer than T 25.0 V 10.0 N 10.0 N 44. @СА lig a socket at of the twe Lomu 20.0 N end of th 5.00 N. 5.00 N (a) Expla cannot be (c) Find t circuit. Figure P21.39 40. Four resistors are connected to a battery as shown in Fig- ure P21.40. The current in R1 = R the battery is I, the battery lo emf is ɛ, and the resistor i s 29orle values are R = R, R, = 2R, R, = 4R, and R = 3R. (a) Rank the resistors ac- cording to the potential dif- ference across them, from largest to smallest. Note any cases of equal potential differences. (b) Determine the potential differ- ence across each resistor in terms of Ɛ. (c) Rank the resistors according to the current in them, from largest to smallest. Note any cases of equal currents. (d) Determine the current in each resistor in terms of I. (e) If R. is increased, what happens to the current in each of the resistors? (f) In the limit that R3 → ∞, what are the new values of the current in each resistor in terms of I, the original current in the battery? Section 21.8 Ro = 2R Note: The cu R4 = 3R for some cire R3 = 4R 45. W The a: l ob gaol 1, I, and Figure P21.40 RO has ey 100 N 46. The follo- 100 N a 41. W Three 100-0 resistors 100 N are connected as shown in Figure P21.41. The Figure P21.41
largest
E) IF Rs IS INCREASED ?
maximum power that cans
Ant is t
100 MO reciet
red with an
CHAP 21 (40 CONTD)
he
K3 SRz= in series = same current, WHEN RESISTANLE GOES up, CURRENT GOES DONN
rt (a
it is
rs?
So R, Iz GDES DOWN
a
Rg $ Ry are
ane
(JUNCTION BETWEEN THEM) OVERALL R DECREASES.
ark
ens
I| CIRCUITS V REMAINS THE SAME. INCREASE IN R CAUSES Rea
ear
TO DECREASE AND CURRENT WILL INCREASE-
(а)
xter
.Ry Iy INCREASES
erec
leas
I, comes straight fom E, so it won't change.
I, STAYS SAME
Iz GOES DONN
I3 GOES DONN
ical
rt
ver
F) lim
.43
Iy GOES UP
NEW VALUES OF I
R3-0
Ry
FitIy +I3=I2
narl
I4
of
ctor
ion
Is
E-IR,- Iy Ry=D
E -I,R,-IZR2- I3R3 =0
ie a
thi
3IR-IR-22I BR=0
E- IR - I 2R - I 4R =0
- 2I BR - IZR-I 4R = 0
hof
- 23R - TR- o
3IR-FR-2TR=D0
-IR - 2 IR -4IR=-E
3
ire
IR =0
- 3IR = - E
-4IR=0
r sh-
- 3R
-3R
-4R
-4R
3R
equ
20S
70
Transcribed Image Text:largest E) IF Rs IS INCREASED ? maximum power that cans Ant is t 100 MO reciet red with an CHAP 21 (40 CONTD) he K3 SRz= in series = same current, WHEN RESISTANLE GOES up, CURRENT GOES DONN rt (a it is rs? So R, Iz GDES DOWN a Rg $ Ry are ane (JUNCTION BETWEEN THEM) OVERALL R DECREASES. ark ens I| CIRCUITS V REMAINS THE SAME. INCREASE IN R CAUSES Rea ear TO DECREASE AND CURRENT WILL INCREASE- (а) xter .Ry Iy INCREASES erec leas I, comes straight fom E, so it won't change. I, STAYS SAME Iz GOES DONN I3 GOES DONN ical rt ver F) lim .43 Iy GOES UP NEW VALUES OF I R3-0 Ry FitIy +I3=I2 narl I4 of ctor ion Is E-IR,- Iy Ry=D E -I,R,-IZR2- I3R3 =0 ie a thi 3IR-IR-22I BR=0 E- IR - I 2R - I 4R =0 - 2I BR - IZR-I 4R = 0 hof - 23R - TR- o 3IR-FR-2TR=D0 -IR - 2 IR -4IR=-E 3 ire IR =0 - 3IR = - E -4IR=0 r sh- - 3R -3R -4R -4R 3R equ 20S 70
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