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Network Theory
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Network Elements and the Concept of Circuit
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Network Elements and the Concept of Circuit
Easy Questions
Network Theory
Network Elements and the Concept of Circuit
Network theory miscellaneous
The energy stored in the magnetic field at a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current of 10A, is—
0.015 joule
0.15 joule
0.5 joule
1.15 joule
Correct Option:
B
We know
Energy =
µ. N
2
A
I
=
4π × 10
–7
× (1000)
2
× π × (3 / 2 × 10
–2
)
2
30 × 10
–2
= 0.15 joule.
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