3. Using superposition, find the current I through the 24 V source in Fig. 9.121. E₁ = + 42 V R₁ 118 Ω R₂ 10 24 V +1/+ E₂ 19Ω I R3 :15 Ω FIG. 9.121 Problem 3. R₁

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Q: R, R. Fig. 9-33

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Q: 21.- Find value of V2 and next cireuit. 40k52 Vる R2 46KR J3 Eュ=6ov + う

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Q: aVx Z4 Zs BIx Ix Z3 V2 Ig Z6 Vx Eg Z2 Zi V3 o lx=lg+aV2 O x= aV3 O Ix=aVxZ5 O Ix=lg-aV3

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KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.