Physics, 24.02.2022 04:50, webbjalia04
Tiny sensors in smartphone could be used to determine the position of the phone on
the Earth’s surface by measuring the Earth’s magnetic field. A current I is applied to a
slice of semiconductor as shown in Figure 1(a).
After detecting magnetic field, Bexternal of 2.55 mT on the slice, the electrons collect at
the top edge of the slice and the bottom edge becomes positively charged as shown in
Figure 1(b).
(a) Explain why the electrons collect at the top of the edge of the slice.
(b) Determine the magnitude of the maximum magnetic force that could be exerted on
the electron if the electron moves through the field with a speed of 5.5 × 106 m s
−1
.
(c) What is the magnitude of the maximum acceleration of the electron?
(d) Would the field exert the same magnetic force exerted on a proton moving through
the field with the same speed in (c)? Explain your answer.
(e) If there is a straight wire with current of 6.0 A placed 1.5 mm near the slice of
semiconductor as shown in Figure 1(c), determine the magnitude and direction of the
magnetic field at point A.
Answers: 3
Physics, 22.06.2019 04:40, love5965
Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely
Answers: 1
Physics, 22.06.2019 12:40, ericsmith19
Afrequency generator sends a 550 hz sound wave through both water and ice. what is the difference in wavelength between the wave produced in ice and the wave produced in water?
Answers: 3
Physics, 22.06.2019 16:50, lizzepacheco
Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.
Answers: 2
Tiny sensors in smartphone could be used to determine the position of the phone on
the Earth’s sur...
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Mathematics, 30.05.2020 00:01
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Mathematics, 30.05.2020 00:01
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