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Physics
Physics
Problem
An ideal transformer reduces the mains voltage from
240
V
240\,\text{V}
240
V
to
120
V
120\,\text{V}
120
V
for a domestic appliance. Which statement about the currents in the two windings is correct? a)
I
s
=
1
2
I
p
I_s = \dfrac{1}{2}I_p
I
s
=
2
1
I
p
b)
I
s
=
I
p
I_s = I_p
I
s
=
I
p
c)
I
s
=
2
I
p
I_s = 2 I_p
I
s
=
2
I
p
d)
I
s
=
4
I
p
I_s = 4 I_p
I
s
=
4
I
p
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