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
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Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?
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Physics, 22.06.2019 15:30
What is a subatomic particle with a negative charge and very little mass?
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Physics, 23.06.2019 04:31
You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.
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Tiny sensors in smartphone could be used to determine the position of the phone on
the Earth’s sur...
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