14) What is the minimum number of 65 Ohm resistors that must be connected in parallel to produce an equivalent resistance of 11 Ohms or less?

College Physics
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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Question 14
13) A bird lands on a bare copper wire carrying a
current of 32A. The wire has a cross sectional area of
0.13 cm². Find the difference in potential between the
bird's feet, assuming they are separated by a distance of
6 cm.
resistivity of copper = 1.7 x 10-8
14) What is the minimum number of 65 Ohm resistors
that must be connected in parallel to produce an
equivalent resistance of 11 Ohms or less?
15) A 12V battery is connected to three capacitors in
series. The capacitors have the following capacitance:
4.5 UF, 12 uF, and 32 uF, Find the voltage across
the 32 uF capacitor.
16) A particle enters a magnetic field in the positive x
direction. The Magnetic field points in the positive z
direction. The particle feels a force in the positive y
direction. Is the charge on the particle positive or
negative?
17) A 0.32 uC particle moves with a speed of 16 m/s
through a region where the magnetic field has strength
of 1 T. At what angle to the field is the particle moving
if the force exerted on it is 4.8 x 10-6 Newtons?
Transcribed Image Text:13) A bird lands on a bare copper wire carrying a current of 32A. The wire has a cross sectional area of 0.13 cm². Find the difference in potential between the bird's feet, assuming they are separated by a distance of 6 cm. resistivity of copper = 1.7 x 10-8 14) What is the minimum number of 65 Ohm resistors that must be connected in parallel to produce an equivalent resistance of 11 Ohms or less? 15) A 12V battery is connected to three capacitors in series. The capacitors have the following capacitance: 4.5 UF, 12 uF, and 32 uF, Find the voltage across the 32 uF capacitor. 16) A particle enters a magnetic field in the positive x direction. The Magnetic field points in the positive z direction. The particle feels a force in the positive y direction. Is the charge on the particle positive or negative? 17) A 0.32 uC particle moves with a speed of 16 m/s through a region where the magnetic field has strength of 1 T. At what angle to the field is the particle moving if the force exerted on it is 4.8 x 10-6 Newtons?
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