Resistance, Resistivity, and Ohm's Law
AP Physics C Electricity and Magnetism · Flashcards · Application
AP PHYSICS C ELECTRICITY AND MAGNETISM · FLASHCARDS
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QUESTION
Find the resistance in a circuit with
V
=
12
V
V = 12 \text{V}
V
=
12
V
and
I
=
4
A
I = 4 \text{A}
I
=
4
A
.
QUESTION
What is the resistance if resistivity is
2
Ωm
2 \text{Ω}\text{m}
2
Ω
m
, length is
4
m
4 \text{m}
4
m
, and area is
1
m
2
1 \text{m}^2
1
m
2
?
QUESTION
Find the resistance if
V
=
10
V
V = 10 \text{V}
V
=
10
V
and
I
=
2
A
I = 2 \text{A}
I
=
2
A
.
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ANSWER
R
=
5
Ω
R = 5 \text{Ω}
R
=
5
Ω
. Using
R
=
V
I
=
10
2
=
5
Ω
R = \frac{V}{I} = \frac{10}{2} = 5 \text{Ω}
R
=
I
V
=
2
10
=
5
Ω
.
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