Question

The direction of the magnetic field in a certain region of space is determined by firing a test charge into the region with its velocity in various directions in different trials. The field direction is:

Group of answer choices

one of the directions of the velocity when the magnetic force is zero

the direction of the velocity when the magnetic force is a maximum

the direction of the magnetic force

perpendicular to the velocity when the magnetic force is zero

none of the above

Answer #1

The direction of force on a moving electric charge in a magnetic
field is (Select all that apply)
in the direction of the magnetic field
in the directions of the charge
perpendicular to the magnetic field
perpendicular to the direction of the motion of the charge
none of the above

In a certain region of space, there is a uniform electric field
E= 4.3 x 104 V/m to the east and a uniform magnetic
field B = .0073 T to the west. a) What is the electromagnetic force
on an electron moving north at 3.7 x 107 m/s? b) With
the electric and magnetic fields as specified, is there some
velocity such that the net electromagnetic force on the electron
would be zero?

A proton moves in a direction perpendicular to the magnetic
field lines. The magnetic force exerted on the proton is
perpendicular to both the direction of the velocity and the
direction of the magnetic field.
True
False

The magnitude of the magnetic field in a certain region is
represented by the equation
|B| = at2 + bt + c,
where
a = 0.045 T/s2,
b = 0.045 T/s
and
c = 0.168 T.
A circular coil with 55 turns and diameter 12.5 cm is placed in
this region with its plane perpendicular to the direction of the
magnetic field. What is the magnitude of the induced emf at
t = 3.00 s?
I wrote 184.8, but it...

1. Which of the following statements about the direction of a
magnetic force is always true? (Note: More than one answer choice
may be correct)
a)The direction of the magnetic force on a moving charged particle
is parallel to the direction of the external magnetic field.
b)The direction of the magnetic force on a moving charged particle
is parallel to the direction of the charged particle's
velocity.
c)The direction of the magnetic force on a moving charged particle
is perpendicular...

1.
A cylindrical region of space of radius R contains a uniform
magnetic field B with direction into the page. If the magnitude B
inside the cylinder changes in time and outside the cylinder it is
zero, describe the induced electric field (magnitude and direction)
for points inside the cylinder (r < R). Find the magnitude and
direction of the induced electric field at r = 5.00 cm if the
magnetic field changes at a constant rate from 0.500T to...

The direction of the magnetic force on an electron moving
through a magnetic field is the same as the direction of the vector
formed by taking the cross product of the velocity with the
magnetic field (v x B).
True/ False
The magnetic field is also referred to as the magnetic flux
_____________ [one word].
Consider a particle moving through a magnetic field. If the
magnetic field doubles and the velocity of the particle halves, the
magnetic force will:...

In a certain region, the earth's magnetic field has a magnitude
of 5.1 × 10-5 T and is directed north at an angle of 54° below the
horizontal. An electrically charged bullet is fired north and 16°
above the horizontal, with a speed of 660 m/s. The magnetic force
on the bullet is 3.6 × 10-10 N, directed due east. Determine the
bullet's electric charge, including its algebraic sign (+ or
-).

In a certain region, the earth's magnetic field has a magnitude
of 5.4 × 10-5 T and is directed north at an angle of 46°
below the horizontal. An electrically charged bullet is fired north
and 17° above the horizontal, with a speed of 660 m/s. The magnetic
force on the bullet is 3.9 × 10-10 N, directed due east.
Determine the bullet's electric charge, including its algebraic
sign (+ or -).

How could the direction of a magnetic field be determined by
making only qualitative observations of the magnetic force on a
straight wire carrying a current?

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