10. In the circuit shown below, the current recorded
by the ammeter is
eter
20 Ω
А
B
3092
30 Ω
+
C С
12
7.5
7.5 V
(a) 0.25 A.
(b) 0.50 A.
. (c) 0.75 A.
(d) 1 A.
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0
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12th
Physics
Alternating Current
AC Voltage Applied to an Inductor
In the circuit shown, a 30 ...
PHYSICS
In the circuit shown, a 30 V d.c source gives a current 2.0A as recorded in the ammeter A and 30V a.c. source of frequency 100Hz gives a current 1.2A. The inductive reactance is
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ANSWER
In DC current
V=iR
i
V
=R
R=
2
30
=15Ω
In a.c. current
V=iImpedance
i
V
=Impedance
Impedance=
1.2
30
=25ω
Impedance=
R
2
+(X
L
)
2
(25)
2
=R
2
+(X
L
)
2
X
L
=
(25)
2
−R
2
=
625−225
=
400
=20Ω
Answered by
1
Answer:
option d is the correct answer
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