Ch$.29$ Practice Problems

Q$1$ A curment I passing through two semicircles with radius a and $4$ a shown in the figure. The magnetic field $B$ at peint $P$ is:

A$)\frac{5{}_0\text{I}}{16a}$

B$)\frac{t}{165}$

C$)\frac{3{}_0\text{I}}{16a}$

D$)\frac{34t}{3\mathrm{.}60}$

Q$2$ The figure shows a segment of wire carrying a curvent $1.$ The magnetic field at point $P$ is:

A$)\frac{{}_0\text{I}}{2R}$

B$)\frac{81}{28}$

C$)\frac{m1}{8}$

D$)\frac{81}{48}$

Q$3$ A toroid has $1000$ turns and outer radius of $0\mathrm{.}2$ m and internal nadius of $0\mathrm{.}10$ m $,$ carvies a curvent of $10$ A $.$ The magnetic field a distance of $0\mathrm{.}25$ m from its center is:

A$)4mI$

B$)6mT$

C$)10$ mr

D$)8$ mT