Physics Magnetism,Magnetic Effects Of Current Level: High School
The mks unit of magnetizing force is the ?a) ampere-turn per meter.
b) gausss
c) oersted
d) weber per square meter
Physics Magnetism,Magnetic Effects Of Current Level: High School
Which type of magnetic material would you choose to use as a shield for a meter movement ? The shield is to short-circuit the flux around the movement.a) Paramagnetic
b) Diamagnetic
c) Ferromagnetic
Physics Magnetism,Magnetic Effects Of Current Level: High School
A core of magnetic material is of constant cross-sectional area and has a short air gap . A magnetomotive force is applied , and it produces a flux in the series magnetic path but does not saturate the core . The flux density of the magnetic path.a) is always the same in the air gap as in the iron .
b) will probably be somewhat greater in the air gap than in the iron .
c) will probably be somewhat less in the air gap .
d) will probably be much less in the air gap .
Physics Magnetism,Magnetic Effects Of Current Level: High School
You are at the center of a current carrying solenoid (#1) . You are experiencing a magnetic field B1. You replace the solenoid with a different solenoid (B) . the cross sectional area of this replacement solenoid #2 is double that of the original solenoid #1 , but angle of the other parameters are the same as those of the original solenoid, including the current . You will experience a magnetic field of ______ due to this replacement solenoid #2 .a) 2 B1
b) 0.5 B1
c) B1
d) 4 B1
e) 0.25 B1
Physics Magnetism,Magnetic Effects Of Current Level: High School
A magnetic field exerts forces on electric charge within the field . Choose one .Can always
Can sometimes
Never
Physics Magnetism,Magnetic Effects Of Current Level: High School
A particle of charge 2.5 x 10^-6C is moving at 500 m/s in a direction 30 degree N of E . at the location of the particle the magnetic field has size 0.4 T . The particle is experiencing an instantaneous magnetic force of 1.71 x 10^-4 Newton’s directed vertically upward . The size of the angle A between the velocity and the magnetic field at the location of the particle is most nearly what ?a) The magnetic field B is directed somewhere between where ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
A north magnetic pole represents :a) the starting point of a magnetic field .
b) the exist point of a magnetic field .
c) or both
Physics Magnetism,Magnetic Effects Of Current Level: High School
A proton is fired with a speed of 1.0 x 10^6 m/s through the parallel-plate capacitor shown in the figure at 'click here'. The capacitor's electric field is E = (1.0 x 10^5 V/m, down)
a) What magnetic field B , both strength and direction, must be applied to allow the proton to pass through the capacitor with no change in speed or direction ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on a moving charge in a magetnic field
The uniform 30 m T magnetic field in the figure which is shown at ‘click here’ points in the positive z-direction , an electron enters the region of magnetic field with a speed of 5.0 x 10^6 m/s and at an angle of 30 degrees above the xy-plane . Find the radius r and the pitch p of the electron’s spiral trajectory .
Physics Magnetism,Magnetic Effects Of Current Level: High School
Ampere's Law
Consider a long, cylindrical wire of radius R carrying a current , (i), distributed uniformly over the cross section . At what two distances from the axis of the wire is the magnetic field strength due to the current , equal to one-half the value of the surface ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
A magnetic field will be produced at some point in space if the electric field at that point .a) gets stronger
b) gets weaker
c) changes direction
d) all of the above
Physics Magnetism,Magnetic Effects Of Current Level: High School
Magnetic Effect of Current
Calculate the magnitude of the magnetic force on a 160-m length of straight wire stretched between two towers carrying a 150-A current . The earth's magnetic field of 5.0*10^-5 T makes an angle of 65 degree with the wire .
Physics Magnetism,Magnetic Effects Of Current Level: High School
Earth’s magnetism
The Earth’s magnetic field passes through a square tabletop with a magnitude of 4.95 x 10^-5 T and directed at an angle of 165 degree relative to the normal of the tabletop. If the tabletop has 1.50 –m sides , what is the magnitude of the magnetic flux through it ?a) 108 x 10^-4 Wb
b) 7.11 x 10^-5 Wb
c) 2.88 x 10^-5 Wb
d) 1.92 x 10^-5 Wb
e) 3.30 x 10^-6 Wb
Physics Magnetism,Magnetic Effects Of Current Level: High School
Solenoid
Which one of the following material is not ferromagnetic ?a) Iron
b) Chromium dioxide
c) Nickel
d) Aluminum
e) Cobalt
Physics Magnetism,Magnetic Effects Of Current Level: High School
Solenoid
A solenoid of length 0.250 m and radius 0.0200 m is comprised of 120 turns of wire . Determine the magnitude of the magnetic field at the center of the solenoid when it carries a current of 15.0 Aa) 2.26 x 10^-3 T
b) 4.52 x 10^-3 T
c) 9.05 x 10^-3 T
d) 7.50 x 10^-3 T
e) zero tesla
