Electromagnetic Induction and Faraday's Law
AP Physics 2 · Flashcards · Application
AP PHYSICS 2 · FLASHCARDS
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QUESTION
Calculate induced emf for
d
Φ
B
d
t
=
−
3
Wb/s
\frac{d\text{Φ}_B}{dt} = -3 \text{Wb/s}
d
t
d
Φ
B
=
−
3
Wb/s
.
QUESTION
Calculate magnetic flux for
B
=
2
T
B = 2 \text{T}
B
=
2
T
and
A
=
3
m
2
A = 3 \text{m}^2
A
=
3
m
2
.
QUESTION
Find induced emf for
Φ
B
\text{Φ}_B
Φ
B
change from 10 Wb to 5 Wb in 2 s.
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ANSWER
emf
=
−
2.5
V
\text{emf} = -2.5 \text{V}
emf
=
−
2.5
V
. Use
emf
=
−
Δ
Φ
B
Δ
t
=
−
5
−
10
2
=
−
2.5
V
\text{emf} = -\frac{\Delta\Phi_B}{\Delta t} = -\frac{5-10}{2} = -2.5 \text{V}
emf
=
−
Δ
t
Δ
Φ
B
=
−
2
5
−
10
=
−
2.5
V
.
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