1.
A long straight wire carries an electric current perpendicularly out of the paper. Which of the
following represents the magnetic field pattern due to the current?
2.
A point mass carries a positive charge +Q and is at rest in a magnetic field. The field is in the
direction shown.
The magnetic force acting on the charge is
3.
A.
from left to right in the plane of the page.
B.
from top to bottom in the plane of the page.
C.
into the plane of the page.
D.
zero.
A current carrying wire is in the same plane as a uniform magnetic field. The angle between the
wire and the magnetic field is θ.
The magnetic force on the current carrying wire is
A.
zero.
B.
into the plane of the paper.
C.
out of the plane of the paper.
D.
at an angle θ to the direction of the magnetic field.
IB Questionbank Physics
1
4.
This question is about force fields.
(a)
Outline what is meant by a field of force.
......................................................................................................................................
......................................................................................................................................
(2)
(b)
Five particles A to E are each placed in a different type of field. Complete the table to
identify the nature of the field in which each particle is situated.
Particle
Charge on
particle
Initial direction of
motion of particle
Direction of
force on particle
A
uncharged
stationary
in direction of
field
.....................................
B
negative
along direction of
field
opposite to
direction of field
.....................................
C
positive
normal to direction
of field
normal to
direction of field
.....................................
D
positive
normal to direction
of field
in direction of
field
.....................................
E
uncharged
opposite to direction
of field
in direction of
field
.....................................
Type of field
(5)
(Total 7 marks)
5.
In the diagram, a long current-carrying wire is normal to the plane of the paper. The current in
the wire
is directed into the plane of the paper.
Which of the arrows gives the direction of the magnetic field at point P?
A.
W
B.
X
C.
Y
D.
Z
IB Questionbank Physics
2