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27 March 2009
Phys 132 Spring 2009
Question 1
magnetic field.direction. The wire is placed in the indicated A current flows through wire in the indicated
b b b b b b b b b b b
I
of the force exerted on the wire? Which of the following describes the direction
if the charges are positive and
if the
charges are negative,
if the charges are positive and
if the
charges are negative,
if the charges are positive and
if the
charges are negative,
if the charges are positive and
if the
charges are negative, or
- Not enough info/none of the above.
TEX
27 March 2009
Phys 132 Spring 2009
Question 2
currents Wires of different lengths carrying the same
are
placed
in
identical
magnetic
fields.
Case A
× × × × × × ×
× × × × × × ×
× × × × × × ×
× × × × × × ×
× × × × × × ×
I
Case B
× × × × × × ×
× × × × × × ×
× × × × × × ×
× × × × × × ×
× × × × × × ×
I
on the wires?magnitudes of the magnetic forces exerted Which of the following is true regarding the
F A = F B ,
F
A
< F
B
or
F
A
> F
B
TEX
27 March 2009
Phys 132 Spring 2009
Question 4
A
rectangular
loop
is
placed
into
the
indicated magnetic field.
× × × × × × × × ×
× × × × × × × × ×
× × × × × × × × ×
× × × × × × × × ×
× × × × × × × × ×
× × × × × × × × ×
× × × × × × × × ×
Which (choose one) of the following is true?
- There is a net force and a net torque on2. There is a net torque on the loop.1. There is a net force on the loop.
the loop.
- There is neither a net force nor a net
torque on the loop.
TEX
