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Physics
Physics
Problem
Which of the following gives the magnitude of impedance
Z
Z
Z
of a resistor
R
R
R
connected in series with an inductor whose inductive reactance is
X
L
X_L
X
L
? a)
Z
=
R
+
X
L
Z=R+X_L
Z
=
R
+
X
L
b)
Z
=
R
2
−
X
L
2
Z=\sqrt{R^{2}-X_L^{2}}
Z
=
R
2
−
X
L
2
c)
Z
=
R
2
+
X
L
2
Z=\sqrt{R^{2}+X_L^{2}}
Z
=
R
2
+
X
L
2
d)
Z
=
R
2
+
4
X
L
2
Z=\sqrt{R^{2}+4X_L^{2}}
Z
=
R
2
+
4
X
L
2
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