Homework-Chapter 5
1) (a) Find the direction of the force on a proton moving through
the magnetic fields in this figure. (b) Repeat part (a), assuming the
moving particle is an electron.
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Chapter 5, Magnetism
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2) Find the direction of the magnetic field acting on the positively
charged particle which is moving as shown in these figures.
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Chapter 5, Magnetism
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3) Determine the initial direction of the deflection of these charged
particles as they enter the magnetic fields shown in this figure.
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Chapter 5, Magnetism
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4) An electron moves with velocity v = 5.0i + 3.2k m/s through
a uniform magnetic field B = 9.4i + 6.7j T. (a) Find the magnetic
force on the particle. (b) What is the electron’s velocity after 1 ns?
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Chapter 5, Magnetism
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5) A 1.4 µC charge moving at 185 m/s experiences a magnetic
force FB = 2.5i + 7.0j µN in a magnetic field B=42i-15j mT. Find
the angle between the particle's velocity and the magnetic field.
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Chapter 5, Magnetism
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6) A wire of negligible resistance is bent into a rectangle as in this
figure, and a battery and resistor are connected as shown. The
right-hand side of the circuit extends into a region containing a
uniform magnetic field of 38 mT pointing out of the page. Find the
magnitude and direction of the net force on the circuit.
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7) A current of 17.0 mA is maintained in a single circular loop
with a circumference of 2.00 m. A magnetic field of 0.800 T is
directed parallel to the plane of the loop. What is the magnitude of
the torque exerted by the magnetic field on the loop?
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Chapter 5, Magnetism
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8) A proton moves freely in a circular path perpendicular to a
constant magnetic field. The proton takes 2.00 µs to complete 1
revolution. Determine the magnitude of the magnetic field.
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Chapter 5, Magnetism
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9) Find the direction of the current in the wire that would produce
a magnetic field directed as shown.
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Chapter 5, Magnetism
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10) An electron has an initial velocity of (10000 ˆj + 13000kˆ)m / s and a
constant acceleration of (3.00 ×1012 m / s 2 )iˆ in a region in which
uniform electric and magnetic fields are present. If B = (400µT )iˆ ,
find the electric field E .
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Chapter 5, Magnetism
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11) A wire has 1.0 A of current flowing through it. The wire is in
a magnetic field of 3.2 kˆ µT . The wire is situated so that it begins
and ends at the coordinates shown in this figure. In vector
notation, what is the force acting on the wire?
General Physics II
Chapter 5, Magnetism
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General Physics II
Chapter 5, Magnetism
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