Problem 29.55

In a circular region, there is a uniform magnetic field B pointing into the page (see the figure). An ay coordinate system has its

origin at the circular region's center. A free positive point charge +Q=1.0 μC is initially at rest at a position = + 10 cm on the

z axis.

X

X

X

IX X

BX X

X

X

X

XXX+5X X X

+0=1.0 μC

0x +10 cm

Part A

If the magnitude of the magnetic field is now decreased at a rate of -0.14 T/s, what force (magnitude and direction) will act

on +Q?

Express your aswer using two significant figures.

ANSWER:

16/23/nPart B

ANSWER:

The force is in -y- direction.

The force is in +y-direction.

The force is in +x-direction.

The force is in -x-direction.