Consider the following statements for a symmetrical T section
1. Z₁₁ and Z₂₂ are equal
2. Z₁₂ and Z₂₁ are equal
3. Z₁₁ and Z₁₂ are equal
4. Z₂₁ and Z₂₂ are equal
Which of these statements are correct?

According to Kirchhoff’s voltage law, the algebraic sum of all IR drops and e.m.f. in any closed loop of a network is always

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