Which of the following statement is correct:
A. The flow of current in the electric circuit involves discontinuous expenditure of energy
B. The flow of current in the electric circuit requires energy for creating the current but not to maintain it
C. In the magnetic circuit energy is needed continuously to maintain the flux
D. In the magnetic circuit energy is needed for creating the flux initially but not maintain it
Answer: Option D
A. Negative
B. Positive
C. Determined by battery e.m.f.
D. Zero
The number of independent equations to solve a network is equal to
A. The number of chords
B. The number of branches
C. Sum of the number of branches and chords
D. Sum of number of branches, chords and nodes
A closed path made by several branches of the network is known as
A. Branch
B. Loop
C. Circuit
D. Junction
Which of the following is not a nonlinear element ?
A. Gas diode
B. Heater coil
C. Tunnel diode
D. Electric arc

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