EBK PHYSICS FOR SCIENTISTS AND ENGINEER
6th Edition
ISBN: 9781319321710
Author: Mosca
Publisher: VST
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Chapter 38, Problem 55P
To determine
The type of semiconductor type and the concentration of charge carriers.
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Fig. 1
25. A strip-like conductor with dimensions a b c = 6.0.5.6 mm³ is serving as a Hall-probe.
A current of 40 mA is flowing, and the sample is placed in a magnetic field B = 0.8T, as
a result a Hall-Votlage of UH = 20 mV is measured.
a) What is the charge carrier concentration in the sample?
b) What side of the strip-like probe accumulates negative charge if the charge transport
is done via electrons?
c) What Hall-voltage arises from bipolar conduction, hence when the same amount of
electrons and holes contribute to the conduction? Electrons and hole can be assumed to
have equal mobility.
Fig. 2
A Hall probe serves to measure magnetic field strength. One such probe consists of a poor conductor 0.135 mm thick, whose charge‑carrier density is 1.01×1025 m−3. When a 1.97 A current flows through the probe, the Hall voltage is measured to be 4.29 mV. The elementary charge ?=1.602×10−19 C.
What is the magnetic field strength ??
A cylinder with a(n) 1.6 cm radius and a
length of 3.9 m is tightly wrapped with 4000
turns of wire. The current in the wire is
decaying according to I = Io eat, with Io =
1.1 A and a = 4.3s-¹.
What is the electric field at a point 5.9 cm
radially from the axis of the cylinder at t =
0.581395 s?
Answer in units of V/m.
A coil of 320 turns and radius 9.5 cm is con-
centric with and in the central plane of the
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How much power is being dissipated at t =
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the ends of the coil?
Answer in units of W.
Chapter 38 Solutions
EBK PHYSICS FOR SCIENTISTS AND ENGINEER
Ch. 38 - Prob. 1PCh. 38 - Prob. 2PCh. 38 - Prob. 3PCh. 38 - Prob. 4PCh. 38 - Prob. 5PCh. 38 - Prob. 6PCh. 38 - Prob. 7PCh. 38 - Prob. 8PCh. 38 - Prob. 9PCh. 38 - Prob. 10P
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