s
µ
1
s
µ
2
s
µ
5
.
0
I
o
current[A]
The figure is a simplified model of
the current produced by a lightning
strike.
The total charge is ________
[C]
If the voltage of the lightning strike
is 100 [MV] then the total energy
carried by the strike is
E = __________ [J]
The
average power
of the strike is
P = ___________[W]
I
o
= 20[kA]
Quiz1 Fa2000
q
current
q is area under curve
=
⇔
z
mC
C
q
A
s
q
25
]
[
10
*
5
.
2
]
[
10
*
20
*
]
[
10
*
)
2
5
.
0
(
2
1
2
3
6
=
=
+
=
−
−
2
10
*
5
.
2
−
Voltage is energy per
unit charge. Hence
when the voltage is
is constant one has
E = V*Q
6
10
*
5
.
2
Pav is energy over duration
W
P
AV
12
6
6
10
*
25
.
1
10
*
2
10
*
5
.
2
=
=
−
Important point:
VQ
E
WRITE
CAN
ONE
CONSTANT
IS
VOLTAGE
WHEN
ONLY
dt
t
i
t
v
E
power
E
=
=
=
∫
∫
)
(
)
(
A
3
10
*
20
=
V
MV
8
10
]
[
100
=

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