Physics for Scientists and Engineers with Modern Physics
4th Edition
ISBN: 9780131495081
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Textbook Question
Chapter 27, Problem 48P
(II) A rectangular sample of a metal is 3.0 cm wide and 680 μm thick. When it carries a 42-A current and is placed in a 0.80-T magnetic field it produces a 6.5-μV Hall emf. Determine: (a) the Hall field in the conductor; (b) the drift speed of the
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Tutorial Exercise
In an experiment designed to measure the Earth's magnetic field using the Hall effect, a copper bar 0.495 cm thick is positioned along an east-west
direction. Assume n = 8.46 × 1028 electrons/m³ and the plane of the bar is rotated to be perpendicular to the direction of B. If a current of 8.00 A in the
-12
conductor results in a Hall voltage of 4.37 x 10 V, what is the magnitude of the Earth's magnetic field at this location?
Part 1 of 3 - Conceptualize
From this Table of Approximate Magnetic Field Magnitudes, the magnitude of the Earth's magnetic field is about 50 μT. We expect a result with this order
of magnitude.
Part 2 of 3 - Categorize
We will find the magnitude of the magnetic field from the equation for the Hall effect voltage.
Part 3 of 3 - Analyze
Hall effect voltage is given by the following.
IB
nqt'
AVH
where I is the current, n is the volume density of electrons, B is the magnitude of the magnetic field, and t is the thickness of the copper bar. Solving…
(i) What is the cause of ferromagnetism in some materials?
(ii)What is meant by a non-stoichiometric oxide?
(iii)Explain the difference between strong field and weak field.
(a) What is the speed of a supersonic aircraft with a 17.0-m wingspan, if it experiences a 1.60-V Hall voltage between its wing tips when in level flight over the north magnetic pole, where the Earth’s field strength is 8.00 X 10-5 T(b) Explain why very little current flows as a result of this Hall voltage
Chapter 27 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 27.1 - Prob. 1AECh. 27.2 - Prob. 1BECh. 27.3 - A wire carrying current I is perpendicular to a...Ch. 27.3 - A straight power line carries 30A and is...Ch. 27.4 - Prob. 1EECh. 27.4 - What is the sign of the charge in Fig. 2719? How...Ch. 27.4 - A particle in a velocity selector as diagrammed in...Ch. 27 - A compass needle is not always balanced parallel...Ch. 27 - Prob. 2QCh. 27 - A horseshoe magnet is held vertically with the...
Ch. 27 - In the relation F=IlB, which pairs of the vectors...Ch. 27 - The magnetic field due to current in wires in your...Ch. 27 - If a negatively charged particle enters a region...Ch. 27 - In Fig. 2734, charged particles move in the...Ch. 27 - A positively charged particle in a nonuniform...Ch. 27 - Note that the pattern of magnetic field lines...Ch. 27 - Explain why a strong magnet held near a CRT...Ch. 27 - Describe the trajectory of a negatively charged...Ch. 27 - Can you set a resting electron into motion with a...Ch. 27 - A charged particle is moving in a circle under the...Ch. 27 - The force on a particle in a magnetic field is the...Ch. 27 - A beam of electrons is directed toward a...Ch. 27 - A charged particle moves in a straight line...Ch. 27 - If a moving charged particle is deflected sideways...Ch. 27 - How could you tell whether moving electrons in a...Ch. 27 - How can you make a compass without using iron or...Ch. 27 - Prob. 20QCh. 27 - In what positions (if any) will a current loop...Ch. 27 - A rectangular piece of semiconductor is inserted...Ch. 27 - Two ions have the same mass, but one is singly...Ch. 27 - (I) (a) What is the force per meter of length on a...Ch. 27 - (I) Calculate the magnitude of the magnetic force...Ch. 27 - (I) A 1.6-m length of wire carrying 4.5 A of...Ch. 27 - (II) The magnetic force per meter on a wire is...Ch. 27 - (II) The force on a wire is a maximum of 7.50 102...Ch. 27 - (II) Suppose a straight 1.00-mm-diameter copper...Ch. 27 - Prob. 7PCh. 27 - (II) A long wire stretches along the x axis and...Ch. 27 - (II) A current-carrying circular loop of wire...Ch. 27 - (II) A 2.0-m-long wire carries a current of 8.2 A...Ch. 27 - Prob. 11PCh. 27 - (III) A circular loop of wire, of radius r,...Ch. 27 - (I) Determine the magnitude and direction of the...Ch. 27 - (I) An electron is projected vertically upward...Ch. 27 - (I) Alpha particles of charge q = +2e and mass m =...Ch. 27 - (I) Kind the direction of the force on a negative...Ch. 27 - (I) Determine the direction of B for each ease in...Ch. 27 - Prob. 18PCh. 27 - (II) A doubly charged helium atom whose mass is...Ch. 27 - (II) A proton (mass mp), a deuteron (m = 2mp, Q =...Ch. 27 - (II) For a particle of mass m and charge q moving...Ch. 27 - (II) An electron moves with velocity...Ch. 27 - (II) A 6.0-MeV (kinetic energy) proton enters a...Ch. 27 - (II) An electron experiences the greatest force as...Ch. 27 - (II) A proton moves through a region of space...Ch. 27 - (II) An electron experiences a force...Ch. 27 - (II) A particle of charge q moves in a circular...Ch. 27 - (II) An electron enters a uniform magnetic field B...Ch. 27 - Prob. 29PCh. 27 - (II) The path of protons emerging from an...Ch. 27 - (III) Suppose the Earths magnetic field at the...Ch. 27 - Prob. 32PCh. 27 - (III) A proton moving with speed = 1.3 105 m/s...Ch. 27 - (III) A particle with charge +q and mass m travels...Ch. 27 - (I) How much work is required to rotate the...Ch. 27 - (I) A 13.0-cm-diameter circular loop of wire is...Ch. 27 - (II) A circular coil 18.0 cm in diameter and...Ch. 27 - (II) Show that the magnetic dipole moment of an...Ch. 27 - (II) A 15-loop circular coil 22 cm in diameter...Ch. 27 - (III) Suppose a nonconducting rod of length d...Ch. 27 - (I) If the current to a motor drops by 12%, by...Ch. 27 - (I) A galvanometer needle deflects full scale for...Ch. 27 - (I) If the restoring spring of a galvanometer...Ch. 27 - Prob. 44PCh. 27 - (II) An oil drop whose mass is determined to be...Ch. 27 - (II) A Hall probe, consisting of a rectangular...Ch. 27 - (II) A Hall probe used to measure magnetic field...Ch. 27 - (II) A rectangular sample of a metal is 3.0 cm...Ch. 27 - (II) In a probe that uses the Hall effect to...Ch. 27 - Prob. 50PCh. 27 - Prob. 51PCh. 27 - (II) One form of mass spectrometer accelerates...Ch. 27 - (II) Suppose the electric field between the...Ch. 27 - (II) A mass spectrometer is being used to monitor...Ch. 27 - (II) An unknown particle moves in a straight line...Ch. 27 - Protons move in a circle of radius 5.10 cm in a...Ch. 27 - Protons with momentum 3.8 1016 kg m/s are...Ch. 27 - A proton and an electron have the same kinetic...Ch. 27 - Prob. 59GPCh. 27 - Prob. 60GPCh. 27 - Near the equator, the Earths magnetic field points...Ch. 27 - Calculate the magnetic force on an airplane which...Ch. 27 - A motor run by a 9.0-V battery has a 20 turn...Ch. 27 - Estimate the approximate maximum deflection of the...Ch. 27 - Prob. 65GPCh. 27 - The cyclotron (Fig. 2750) is a device used to...Ch. 27 - Magnetic fields are very useful in particle...Ch. 27 - A square loop of aluminum wire is 20.0 cm on a...Ch. 27 - A sort of projectile launcher is shown in Fig....Ch. 27 - Prob. 70GPCh. 27 - In a certain cathode ray tube, electrons are...Ch. 27 - Prob. 72GPCh. 27 - A proton follows a spiral path through a gas in a...Ch. 27 - Prob. 74GPCh. 27 - The power cable for an electric trolley (Fig....Ch. 27 - A uniform conducting rod of length d and mass m...Ch. 27 - In a simple device for measuring the magnitude B...
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