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MCQ Practice 14050 Questions
1. Which of the following materials is used for making coils of resistance box?
(A): (A) Constantan
(B): (B) Copper
(C): (C) Iron
(D): (D) Brass
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By: guest on 02 Jun 2017 12.54 am
Use Mesh analysis z parameters are given by, V1 = Z11I1 + Z12I2 ...(a) V2 = Z21I1 + Z22I2 ...(b) Apply KVL to mesh 1 V1 = 3I1 - 2I3 ...(i) Apply KVL to mesh 2 V2 = 2I2 + 2I3 ...(ii) Apply KVL to mesh 3 5I3 + 2I2 -2I1 =0 ...(iii) 5I3 = 2I1 - 2I2 Put I3 in eq. (i) ...(iv) Put in (ii) Similarly, ...(v) Compare equation (iv) to (a) and equation (v) to (b) ∴ .
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