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VITEEE 2017 Solved Paper
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Section:
Physics
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© examsnet.com
Question : 2
Total: 125
The power dissipated in the circuit shown in the figure is 30 Watts. The value of R is
20 Ω
15 Ω
10 Ω
30 Ω
Validate
Solution:
The power dissipated in the circuit.
P =
V
2
R
e
q
... (i)
v = 10 volt
1
R
e
q
=
1
R
+
1
5
=
5
+
R
5
R
R
e
q
=
(
5
R
5
+
R
)
P = 30 W
Substituting the values in equation (i)
30 =
(
10
)
2
(
5
R
5
+
R
)
15
R
5
+
R
= 10 ⇒ 15 R = 50 + 10 R
5R = 50 ⇒ R = 10 Ω
© examsnet.com
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