inpho solved paper 2010
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HBCS
E
P
s
r
t q t t
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HBCS
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r r r r t
t t rr r
t t r Pr Pr
Pr
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Pr t
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Pr
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Pr
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HBCS
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A B
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HBCS
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t (in seconds)0
5
5
x (in meters)
s t t s s
t (in seconds)0
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x (in meters)
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HBCS
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P
S1 S2
A1 A A2 3
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t
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HBCS
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HBCS
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HBCS
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HBCS
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HBCS
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HBCS
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P
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s s
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negative netnet charge
Sheet of flexible rubber with zero
Wall with a
charge
s
s
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q
s
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HBCS
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P
+Q+q
s s
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B A BAA B
40V20V10V 50V 10V 20V 30V 40V 50V50V30V10V
40V
I II III
20V30V
s
s
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HBCS
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rt t t t
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IIII
IV
II
V (out of the plane of the paper)
t r
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Battery
Crosssectional Pipe full of salt water
+ Ammeter
area A
t t
t
t
tr r
r
t tr r
t t ttr r t tr r
ts t t
r t t
-
HBCS
E
P
t tt t t
Battery D E
C
B
A
t t
tt t
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t
Lightbulb
Battery
t
t
t
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t
t
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t t
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S
N
(c)(a)
(d)
(b)
(e)
S
N
S
N
S
N
S
N
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HBCS
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P
s s s s
ss s s s s
s s
A
B
N S
N
S
s s
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s s s s
v
s s ss s
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(a) (b) (d) (e)(c)
s s s s s s
s
s
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HBCS
E
P
S
N
t t
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t t tt
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t
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qx
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t
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t t
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-
HBCS
E
P
bulb
bulb
bulb
stationarymoving leftv
NS
S N
S N
S Nmoving left
v
stationary
stationary
stationary
collapsing loop
loop rotatingCCW about axis
bulb
axis
axis
axis
axis
I
II
III
IV
t t t
t t
t t
t
t
t t t
t t
t
t t t t t t
B
1P 2P
(c)
t
v
t
t
(d)
(b)
(e)
(a)
t
t
v v
vv
-
HBCS
E
P
s s s s
t s t t t t s s
t t
I increasing1
solenoid ( end view)perspective viewLong solenoid,
t t st t t s t t
s t
t
s
t
P
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s
s
s
s
s
s
s
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s
s
s
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s
s
s
s
s
s
s
s
s
-
HBCS
E
P
-
HBCS
E
P
-
HBCS
E
P
-
HBCS
E
P
-
HBCS
E
P
-
HBCS
E
P
-
HBCS
E
P
t t
t (in seconds)0
5
5
x (in meters)
1 2 3 4 5 6 7 8 9 10
Motion of skater B
Motion of skater A
t (in seconds)0
5
5
x (in meters)
P1 P2
P3
P = (3.6,1.4)1
P = (3.9,3.8) 3P = (3.5,2.4)2
SkaterBMotion of
Motion ofSkaterA
1 2 3 4 5
Coordinates (x,t)
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HBCS
E
P
P
P
P
P
P
P
s
P
s
ss
s
Crown Flint
7.63.13.9
5.2
3.7
r
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HBCS
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ttt
t t t ts
t t st
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t t s
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t t
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P
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