Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on a current carrying conduction
A current-carrying , rectangular coil of wire is placed in a magnetic field . The magnitude of the torque on the coil is not dependent upon which one of the following quantities ?a) The magnitude of the current in the loop
b) The direction of current in the loop
c) The length of the sides of the loop
d) The area of the loop
e) The orientation of the loop
Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on a current carrying conduction
A loop of wire with a weight of 1.47 N is oriented vertically and carries a current I = 1.75A . A segment of the wire passes through a magnetic field directed into the plane of the page as shown in the figure at ‘click here’ . The net force on the wire is measured using a balance and found to be zero . What is the magnitude of the magnetic field ?a) zero tesla
b) 0.51 T
c) 0.84 T
d) 1.5 T
e) 4.2 T
Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on a moving charge
An electron traveling horizontally enters a region where a uniform magnetic field is directed into the plane of the paper as shown in the figure at “click here”. Which one of the following phrases most accurately describes the motion of the electron once it has entered the field ?a) upward and parabolic
b) upward and circular
c) downward and circular
d) upward, along a straight line
e) downward and parabolic
Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on a moving charge
A proton traveling due east in a region that contains only a magnetic filed experiences a vertically upward force away from the surface of the earth . What is the direction of the magnetic field ?a) North
b) East
c) South
d) West
e) Down
Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on a moving charge
An electron enters a region with a uniform magnetic field perpendicular to its direction of motion . The magnitude of the magnetic field is 0.085 T . The electron has a mass of 9.1 x 10-31 kg . Its initial kinetic energy is 5.6 x 10-18 J . Electron moves in a circle .a) What is the kinetic energy of the electron after 5.1 s ?
b) What is the initial direction of the magnetic force ? What is the magnitude of the magnetic force ?
c) What is the radius of the electron’s circular path ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on a moving charge
a)A particle has charge of charge of +2e and mass of 2.54 x 10-25 kg , fixed at origin , what is the electric field ?
b) Proton has +e charge released 3.1 x 10-9 m away . Mass is 1.67 x 10-27 kg . What is the magnitude of the force on the proton ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
Magnetism
you have three iron bars , each of which may or may not be magnet . Each rod is painted black on one end and white on the other . You perform three experiments and find .The black end of bar A repels the white end of bar B .
The white end of bar A attracts the white end of bar C .
The white end of bar B attracts the white end of bar C .
Is bar C a magnet ? Explain you r reasoning ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
A circular loop carrying a current of 1.0 A is oriented in a magnetic field of 0.35 T . The loop has an area of 0.24 m2 and is mounted on an axis , perpendicular to the magnetic field , which allows the loop to rotate . If the plane of the loop is oriented parallel to the field , What torque is created by the interaction of the loop current and field ?
a. 5.8 N.m
b. 0.68 N.m
c. 0.084 N.m
d. 0.017 N.m
Physics Magnetism,Magnetic Effects Of Current Level: High School
Which of the following devices makes use of an electromagnet ?
A. loudspeaker
B. galvanometer
C. both A and B
D. None of the above
(c) both A and B .
Physics Magnetism,Magnetic Effects Of Current Level: High School
A copper wire of length 25 cm is in a magnetic field of 0.20 T . If it has a mass of 10 g . What is the minimum current through the wire that would cause a magnetic force equal to its weight ?
a. 1.3 A
b. 1.5 A
c. 2.0 A
d. 4.9 A
Physics Magnetism,Magnetic Effects Of Current Level: High School
An electron moves through a region of crossed electric and magnetic field . The electric field E = 2000 V/m and is directed straight down . The magnetic field B = 0.80 T and is directed to the left . For what velocity v of the electron into the paper will the electric force exactly cancel the magnetic force?
a. 2500 m/s
b. 4000 m/s
c. 5000 m/s
d. 8000 m/s
Physics Magnetism,Magnetic Effects Of Current Level: High School
Assume that a uniform magnetic field is directed into this page . If an electron is released with an initial velocity directed from the bottom edge to the top edge of the page, which of the following describes the direction of the resultant force acting on the electron ?
a. out of the page
b. to the right
c. to the left
d. into the page
Physics Magnetism,Magnetic Effects Of Current Level: High School
The magnetic pole of the Earth nearest the geographic North Pole corresponds to which of the following ?
a. a magnetic north pole
b. a magnetic south pole
c. a magnetic artic pole
d. a magnetic antarctic pole
(b) a magnetic south pole
Physics Magnetism,Magnetic Effects Of Current Level: High School
A long hollow conductor ( inner radius = 2mm , outer radius = 5mm) carries a current of uniformly distributed over its cross section . At what distance from the axis of the conductor is the magnitude of the magnetic field half of what it is on the conductors outer surface ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
A triangular coil consist of 50 turns and is in presence of a 20 T magnetic field . The coil contains a current of 15 mA and experience a maximum torque of 2000 Nm as a result of the magnetic field . If the coil is in the shape of an equilateral triangle , determine the dimensions of the coil .