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Final_C

Final_C - PHYSICS 1B FINAL FALL QUARTER 2005 C YOUR NAME...

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PHYSICS 1B FINAL FALL QUARTER 2005 C YOUR NAME _________________________________________________________________ YOUR UCSD STUDENT IDENTIFICATION NUMBER_____________________________ INSTRUCTIONS: THERE ARE 30 QUESTIONS ON THIS QUIZ. PLEASE FILL IN THE SCANTRON FORM USING A NUMBER 2 PENCIL. PUT YOUR NAME AND THE IDENTIFICATION NUMBER YOU WERE ASSIGNED IN THE SPACES ABOVE. 1 page of notes is allowed. NO BOOKS CELL PHONES, LAPTOPS ALLOWED. CALCULATORS ARE OK. 1. A uniform 4.5-T magnetic field passes through the plane of a wire loop 0.10 m 2 in area. What flux passes through the loop when the direction of the 4.5-T field is at a 30 angle to the normal of the loop plane? a. 5.0 T m 2 b. 0.52 T m 2 c. 0.39 T m 2 d. 0.225 T m 2 2. Charges of 4.0 μ C and 6.0 μ C are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field magnitude created by these two charges? ( k e = 8.99 10 9 N·m 2 /C 2 ) a. 4.5 10 6 N/C b. 3.1 10 6 N/C c. 1.6 10 6 N/C d. 4.8 10 6 N/C 3. Three capacitors of 1.0, 1.5, and 2.0 F are connected in series. Find the combined capacitance. a. 4.5 F b. 4.0 F c. 2.2 F d. 0.46 F 4. A 12-V battery is connected in series with a switch, 6.0- resistor and coil. What energy is stored in the coil when the current is 2.0 A? The time constant is 4.0 10 4 s. 5. In an AC series circuit the inductive reactance is 50 and the frequency is 100 Hz. What is the inductance in the circuit?

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