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Problems
Contests
National and Regional Contests
USA Contests
MAA AMC
AMC 12/AHSME
1950 AMC 12/AHSME
11
11
Part of
1950 AMC 12/AHSME
Problems
(1)
AHSME 1950- part 1
Source:
7/18/2008
If in the formula C \equal{} \frac {en}{R\plus{}nr},
n
n
n
is increased while
e
e
e
,
R
R
R
and
r
r
r
are kept constant, then
C
C
C
:
<
s
p
a
n
c
l
a
s
s
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
A
)
<
/
s
p
a
n
>
Increases
<
s
p
a
n
c
l
a
s
s
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
B
)
<
/
s
p
a
n
>
Decreases
<
s
p
a
n
c
l
a
s
s
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
C
)
<
/
s
p
a
n
>
Remains constant
<
s
p
a
n
c
l
a
s
s
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
D
)
<
/
s
p
a
n
>
Increases and then decreases
<
s
p
a
n
c
l
a
s
s
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
E
)
<
/
s
p
a
n
>
Decreases and then increases
<span class='latex-bold'>(A)</span>\ \text{Increases} \qquad <span class='latex-bold'>(B)</span>\ \text{Decreases} \qquad <span class='latex-bold'>(C)</span>\ \text{Remains constant} \qquad <span class='latex-bold'>(D)</span>\ \text{Increases and then decreases} \qquad\\ <span class='latex-bold'>(E)</span>\ \text{Decreases and then increases}
<
s
p
an
c
l
a
ss
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
A
)
<
/
s
p
an
>
Increases
<
s
p
an
c
l
a
ss
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
B
)
<
/
s
p
an
>
Decreases
<
s
p
an
c
l
a
ss
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
C
)
<
/
s
p
an
>
Remains constant
<
s
p
an
c
l
a
ss
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
D
)
<
/
s
p
an
>
Increases and then decreases
<
s
p
an
c
l
a
ss
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
E
)
<
/
s
p
an
>
Decreases and then increases