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All magnetic fields are caused by
Two wires running parallel to each other experience
Two wires running perpendicular to each other experience
Two wires running anitparallel to each other experience
Einstein derived relativity from
The force on a moving charge in the presence of a magnetic field is always
The force on a moving charge in a magnetic field is always proportional to
The force on a moving charge parallel to a magnetic field is always
The force on a charge moving perpendicular to a magnetic field is given by
The force on a wire moving perpendicular to a magnetic field is given by
The force on a charge moving at some angle
to a magnetic field is
The total work done by a magnetic field on a moving charge is always
The net charge on a wire carrying a current
The magnetic force is always
All magnets have
A compass measures
The point on the compass of a needle near a current carrying wire always points
The magnetic field caused by a wire with current
Magnetic field lines near straight wires are always
The force, per unit length, between two parallel current carrying wires is
The unit of magnetic field, in CGS units, is
The magnitude of the magnetic field at a point
caused by a small length of
, at an angle
to the vector from
is given by
What is the magnitude of the magnetic field of a wire carrying a current of
esu/sec, at a distance of 2 cm from the wire?
A ring of wire carrying a current creates what kind of magnetic field?
On the axis of a current carrying ring of radius
, at what point is the
magnetic field maximum?
A ring of radius 2 cm carries a current of
esu/sec. What is the
strength of the magnetic field at the center of the ring?
The field inside a long solenoid can be approximated as
The magnetic field inside a solenoid is maximum
A solenoid of length 1,000 cm has 2,000 turns carrying a current of
esu/sec. Because it is so long, it can be approximated near the center as an
solenoid. What is the magnetic field strength at the center of the solenoid?
A current carrying wire is placed along the axis of a long solenoid. In what
the force on the wire point?
The field along the axis of an infinitely long solenoid is given by
The first right hand rule is used to determine
The second right hand rule is used to determine
A ring and an infinite solenoid both have the same radius and current. Which one
produces a stronger magnetic field on its axis?
The divergence of a vector field at a given point is
What is the divergence of the field
(2x, 2y, 2x)
What is the divergence of the field
2, x + y, z)
Gauss' theorem relates
Gauss' theorem only applies to
The curl of a vector field at a given point is
The curl measures
What is the curl of
(2x, 2y, 2z)
Stokes' Theorem relates
The line integral around any closed loop in an electric field is equal to
The line integral around any closed loop in a magnetic field is equal to
The curl of any magnetic field is
The divergence of any magnetic field is
The fact about the divergence in a magnetic field is due to
is equal to
How many licks does it take to get to the center of a tootsie roll pop?
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