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(AC source) At a particular volume setting, a stereo amplifier applies a maximum voltage
of 30.0 V across each of two 8.00 Ω speakers.
11. The effective current in each speaker at this setting is
D. 1.88 A
5.30 A Use your recorded answer for Multiple Choice 11 to answer Numerical Response 5.*
5. The average power dissipated in each speaker at this setting, expressed in scientific
notation, is b × 10w W. The value of b is __________. (Record your three-digit answer in the numerical-response section on the answer sheet.)
*You can receive marks for this question even if the previous question was answered incorrectly. 7 Use the following information to answer the next two questions.
and AC to DC
converter + – X Y Dirty
filter One type of air cleaner uses a single-stage electrostatic precipitator to remove
very fine particles, such as cigarette smoke and pollen, from the air in a room.
The first grid, marked as X in the diagram, removes electrons from the
particles through a combination of friction and electrostatic action. The
particles pass through grid X and leave with a positive charge. The positively
charged particles are then removed from the air stream by a negatively charged
grid, marked as Y in the diagram. This cleaner also contains a pre-filter and a
carbon filter to help remove dust and odours.
12. When particles are between grids X and Y, they are repelled by
D. grid X and each other, but are attracted to grid Y
grid Y and each other, but are attracted to grid X
grid X but are attracted to each other and grid Y
grid Y but are attracted to each other and grid X 8 13. An electric field of magnitude 7.17 × 104 N/C is maintained between the grids of
the electrostatic precipitator. The distance between grids X and Y is 5.60 cm. The
potential difference across grids X and Y is
A. 1.28 × 106 V B. 4.02 × 105 V C. 1.28 × 104 V D. 4.02 × 103 V Use the following information...
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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