MCQ
$1 a.m.u.$ is equivalent to
- A$1.6 \times {10^{ - 12}}Joule$
- B$1.6 \times {10^{ - 19}}Joule$
- ✓$1.5\, \times {10^{ - 10}}Joule$
- D$1.5 \times {10^{ - 19}}Joule$
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$(A)$ In the region $0 < r < R$, the magnetic field is non-zero.
$(B)$ In the region $R < r < 2 R$, the magnetic field is along the common axis.
$(C)$ In the region $R < r < 2 R$, the magnetic field is tangential to the circle of radius $r$, centered on the axis.
$(D)$ In the region $r > 2 R$, the magnetic field is non-zero.


