Wednesday, December 24, 2014
Thursday, November 20, 2014
Sunday, November 9, 2014
Chapter 21, Problems 4, 7. A single loop of wire ...
Physics Olympiad
Chapter 21, Problem 4. A single loop of
wire with an area of x1 m2 is in a uniform
magnetic field that has an initial value of x2 T, is
perpendicular to the plane of the loop, and is decreased with the
constant rate of x3 T/s.
(a) What emf is
induced in this loop?
(b) If the loop has a resistance of x4
Ω, find the current induced in the loop.
Chapter 21, problem 7. A closely wound
rectangular coil of N turns has dimensions of x1 cm by x2
cm. The plane of the coil is rotated from a position where it makes
an angle of x3ᵒ with a magnetic field of x4 T
to a position perpendicular to the field. The rotation takes x5
s.
What is average emf induced on the coil?
(a) What emf is induced in this loop?
What is average emf induced on the coil?
Tuesday, November 4, 2014
Magnetic Field and Magnetic Forces: Problems
Chapter 20, problem 31.
A rectangular x1 cm by x2 cm circuit carrying an x3 A current is oriented with its plane parallel to a uniform x4 T magnetic field (Figure 20.62, page 693).(a) Find the magnitude and direction of the magnetic force on each straight segment of this rectangular circuit.
Illustrate your answers with clear diagrams.
(b) Find the magnitude of the net force on the entire circuit.
(c) Find the magnitude of the net torque on the entire circuit.
Chapter 20, problem 57.
A circular metal loop is x1 cm in diameter.How large a current must flow through this metal so that the magnetic field at its center is equal to the magnetic field of x2 T?
Chapter 20, problem 62.
Two circular concentric loops of wire lie on a tabletop, one inside the other.The inner loop has a diameter of x1 cm and carries a clockwise current of x2 A,
as viewed from above, and the outer wire has a diameter of x3 cm.
What must be the magnitude and direction (as viewed from above) of the current in the outer loop so that the net magnetic field due to this combination of loops is zero at the common center of the loops?
Chapter 20, problem 64.
A solenoid contain N coils of very thin wire evenly wrapped over a length of x1 cm.Each coil is x2 cm in diameter.
If yhis solenoid carries a current of x3 A, what is the magnetic field at its center?
Wednesday, September 17, 2014
General Physics in Web Nets
General Physics course PHY110 in
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- blogspot: http://generalphys.blogspot.com/
Borough of Manhattan Community College, 199 Chambers Street, New York, NY 10007, USA
- twitter: https://twitter.com/GeneralPhysics
- facebook: https://www.facebook.com/GeneralPhysics
- google+ community:https://plus.google.com/communities/107560119663318352211
- google+ page: https://plus.google.com/b/114989418791144444959/
- blogspot: http://generalphys.blogspot.com/
Borough of Manhattan Community College, 199 Chambers Street, New York, NY 10007, USA
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