Physics 30 Jan 01 Diploma Exam

# 13 13 18 a copper wire is connected to a battery so

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Unformatted text preview: nd the mass of the wire affected by the magnetic field is 20 g. In order to suspend the segment of wire, the minimum current in the wire must be A. B. C. D. 0.044 A 0.23 A 4.4 A 44 A Use the following information to answer the next three questions. The AC adapter for a pocket calculator contains a transformer that converts 120 volts into 3.0 volts. The pocket calculator draws 450 mA of current from the transformer. Assume that the transformer is an ideal transformer. 19. If the transformer’s secondary coil has exactly 50 turns, then the number of turns in the primary coil is A. B. C. D. 20. 7 turns 40 turns 50 turns 2.0 × 103 turns The current in the primary coil of the adapter is A. 0.80 mA B. C. D. 1.3 mA 11 mA 18 A Numerical Response 08. The power supplied by the primary coil is __________ W. (Record your two-digit answer in the numerical-response section on the answer sheet.) 14 14 Numerical Response 09. A microwave signal that has a wavelength of 6.25 × 10– 3 m is created by an oscillating current in a microwav...
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## This note was uploaded on 01/14/2014 for the course PHYSICS Physics 30 taught by Professor Quinlan during the Fall '09 term at Centennial High School.

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