A proton of mass $1.67 \times {10^{ - 27}}\,kg$ and charge $1.6 \times {10^{ - 19}}\,C$ is projected with a speed of $2 \times {10^6}\,m/s$ at an angle of $60^\circ $ to the $X - $ axis. If a uniform magnetic field of $0.104$ $Tesla$ is applied along $Y - $ axis, the path of proton is
A proton of mass $1.67 \times {10^{ - 27}}\,kg$ and charge $1.6 \times {10^{ - 19}}\,C$ is projected with a speed of $2 \times {10^6}\,m/s$ at an angle of $60^\circ $ to the $X - $ axis. If a uniform magnetic field of $0.104$ $Tesla$ is applied along $Y - $ axis, the path of proton is
- [IIT 1995]
- A
A circle of radius =$ 0.2 \,m$ and time period $\pi \times {10^{ - 7}}\,s$
- B
A circle of radius = $0.1\, m$ and time period $2\pi \times {10^{ - 7}}\,s$
- C
A helix of radius =$0.1 \,m $ and time period $2\pi \times {10^{ - 7}}\,s$
- D
A helix of radius = $0.2\, m$ and time period $4\pi \times {10^{ - 7}}\,s$
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