Question

a. A positive charge is dropped downward into a uniform magnetic field directed into the page. What direction is the force exerted on the charge as it first enters the magnetic field? b. A positive charge initially moving to the right enters a region containing a uniform magnetic field. The charge is initially deflected upward as it enters the magnetic field. What must be the direction of the magnetic field? c. A long, straight wire carries a current. There is a uniform magnetic field directed to the left (not due to the wire) and the force exerted on the wire is directed downward. In what direction is the current? d. A long, straight wire carries current directed out of the page. What is the directing of the magnetic field that the current generates at a location directly above the wire? e. A wire loop exists in the plane of the page. An increasing magnetic field directed out of the page penetrates through the loop. What is the direction of the induced current?

          a. A positive charge is dropped downward into a uniform magnetic
field directed into the page. What direction is the force exerted
on the charge as it first enters the magnetic field?
b. A positive charge initially moving to the right enters a
region containing a uniform magnetic field. The charge is initially
deflected upward as it enters the magnetic field. What must be the
direction of the magnetic field?
c. A long, straight wire carries a current. There is a uniform
magnetic field directed to the left (not due to the wire) and the
force exerted on the wire is directed downward. In what direction
is the current?
d. A long, straight wire carries current directed out of the
page. What is the directing of the magnetic field that the current
generates at a location directly above the wire?
e. A wire loop exists in the plane of the page. An increasing
magnetic field directed out of the page penetrates through the
loop. What is the direction of the induced current?

Added by Carla S.

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