Đáp án: D
Ta có:
e
c
=
ΔΦ
Δt
=
BΔS
Δt
=
B
⋅
l
⋅
v
⋅
Δt
Δt
=
B
⋅
l
⋅
v
=
0
,
5.0
,
15.3
=
0
,
225
V
Suy ra:
I
=
e
c
R
=
0
,
225
0
,
5
=
0
,
45
A