Given

magnetic field B = 0.23 T

angle \(\displaystyle\theta={45}\)

velocity \(\displaystyle{V}={3}\cdot{10}^{{6}}\) m/s

time period of revolution

\(\displaystyle{T}={\frac{{{2}\theta{m}}}{{{B}{q}}}}\)

mass of the electron \(\displaystyle{m}={9.1}\cdot{10}^{{-{31}}}\) kg

charge of the electron \(\displaystyle{q}={1.6}\cdot{10}^{{-{16}}}\) C

\(\displaystyle\text{pitch of the helix}=\text{time period}\cdot\text{velocity(parallel)}\)

\(\displaystyle{V}_{{{p}{a}{r}{a}{l}\le{l}}}={V}\cdot{\cos{{45}}}\)

magnetic field B = 0.23 T

angle \(\displaystyle\theta={45}\)

velocity \(\displaystyle{V}={3}\cdot{10}^{{6}}\) m/s

time period of revolution

\(\displaystyle{T}={\frac{{{2}\theta{m}}}{{{B}{q}}}}\)

mass of the electron \(\displaystyle{m}={9.1}\cdot{10}^{{-{31}}}\) kg

charge of the electron \(\displaystyle{q}={1.6}\cdot{10}^{{-{16}}}\) C

\(\displaystyle\text{pitch of the helix}=\text{time period}\cdot\text{velocity(parallel)}\)

\(\displaystyle{V}_{{{p}{a}{r}{a}{l}\le{l}}}={V}\cdot{\cos{{45}}}\)