PHYS 122 Midterm: PHY122A UW Exam 3
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The capacitors are shown to hold 1. 2 j of energy. What is the emf of the battery: 0. 0031 v, 380 v, 458 v, 586 v, 760 v, [5 points] a dielectric of k=1. 3 is inserted to c1 while the network is still connected to the 17v battery. What is ceq now: 5. 0 f, 7. 0 f, 18 f, 24 f, 2. 0 x 10 5 f. [31 points: [5 points] resistor, inc. , has made a cylindrical resistor out of a material with resistivity = 9. 71 x 10-8 m (shown at right). Resistor, inc. , wants to halve the diameter but keep the same resistance, they will have to find a material with a resistivity of r. All user, inc. components are built and tested under vacuum. A: 1 v, 3 v, 5 v, 20 v, not enough information to calculate. User, inc. , now constructs the circuit at left. R1 and v1 are adjusted so there no current flows through r1.
