To determine The voltage across the resistance, R 3 . Explanation Write the expression for equivalent resistance for parallel connection. 1 R = 1 R 3 + 1 R 2 R = R 3 R 2 R 3 + R 2 (I) Here, R is the equivalent resistance and R 3 , R 2 are the individual resistances. Write the expression for the equivalent resistance in series connection. R eq = R + R 1 + r (II) Here, R eq is the total resistance and r is the internal resistance. Write the expression for Ohm’s law. V = i R eq (III) Here, V is the applied voltage and I is the current flowing in the circuit. Write the expression of current through R 3 i 3 = i R 2 R 2 + R 3 (IV) Write the Expression of voltage across resistance, R 3 . V 3 = i 3 R 3 (V) Conclusion: The Below figure represents the direction of current. Substitute 2 Ω for R 3 and 2 Ω for R 4 in Equation (I) to calculate R . R = 47 Ω × 33 Ω 47 Ω + 33 Ω = 19.3875 Ω Substitute 19.3875 Ω for R , 33 Ω for R 1 and 12.5 Ω for r in Equation (II) to calculate r p R eq = 19

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ISBN: 9780134988566

Author: Wolfson, Richard

Publisher: Pearson Education,

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Chapter 25, Problem 36E

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The voltage across the resistance, R3.

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Chapter 25, Problem 35E

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