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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 twodigit answer in the numericalresponse 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.
 Fall '09
 Quinlan
 Physics

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