Answer
The magnitude of the magnetic field is $~~3.3\times 10^{-7}~T$
Work Step by Step
We can find the magnitude of the magnetic field:
$B = \frac{E}{c}$
$B = \frac{100~V/m}{3.0\times 10^8~m/s}$
$B = 3.3\times 10^{-7}~T$
The magnitude of the magnetic field is $~~3.3\times 10^{-7}~T$.
