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SP212/3321&5521 Chapter 27 - Worksheet #2 Question 1: In the circuit shown below, we know that the current passing through the 12.0 Ω resistor is 1.27 A pointing to the right. What is E 1 , the emf of the top battery? (Assume that the batteries are ideal.) 6.00 Ω − + E1 12.0 Ω i=1.27 A − + 9.00 Ω 27.0 V Question 2: In the circuit shown below, the current through the 4.00 Ω resistor is 1.77 A directed to the right. What is the current passing through the 2.00 Ω resistor? (Both batteries are ideal, and the emf of the top battery is unknown.) 2.00 Ω i=? E1 4.00 Ω i=1.77 A 6.00 Ω 15.0 V SP212/3321&5521 Chapter 27 - Worksheet #2 Question 3: In the circuit shown below, we know that the current passing through the 8.00 Ω resistor is 1.75 A pointing to the right. (a) At what rate does the 12.0 Ω resistor dissipate thermal energy? (b) At what rate does the 8.00 Ω resistor dissipate thermal energy? (c) At what rate does the 6.00 Ω resistor dissipate thermal energy? (d) At what rate is energy being transferred by the 27.0 V battery? Is the battery being discharged (chemical energy is transferred into electrical energy) or recharged (electrical energy is transferred into chemical energy)? (e) At what rate is energy being transferred by the 9.00 V battery? Is the battery being discharged (chemical energy is transferred into electrical energy) or recharged (electrical energy is transferred into chemical energy)? 12.0 Ω + − 9.00 V 8.00 Ω i=1.75 A + 6.00 Ω − 27.0 V
