An electron (mass = $9.0 × $${10^{ - 31}}$ $kg$ and charge =$1.6 \times {10^{ - 19}}$ $coulomb$) is moving in a circular orbit in a magnetic field of $1.0 \times {10^{ - 4}}\,weber/{m^2}.$ Its period of revolution is
An electron (mass = $9.0 × $${10^{ - 31}}$ $kg$ and charge =$1.6 \times {10^{ - 19}}$ $coulomb$) is moving in a circular orbit in a magnetic field of $1.0 \times {10^{ - 4}}\,weber/{m^2}.$ Its period of revolution is
- A
$3.5 \times {10^{ - 7}}$ $sec$
- B
$7.0 \times {10^{ - 7}}$ $sec$
- C
$1.05 \times {10^{ - 6}}$ $sec$
- D
$2.1 \times {10^{ - 6}}$ $sec$
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