AIIMS2011PhysicsMagnetic Effects of Current
A proton travels few distance in an electric field, then it enters a crossed magnetic field of 1 ~T and radius 0.2 ~m , find the velocity of proton.
Options
- A0.2 10^8 ~m ~s ⁻¹
- B0.2 10^7 ~m ~s ⁻¹
- C0.2 10^6 ~m ~s ⁻¹
- D2 10^7 ~m ~s ⁻¹
Correct answer
A. 0.2 10^8 ~m ~s ⁻¹
Step-by-step solution
Given, B=1 ~T , r=0.2 ~m r= m v q B i.e, v= 0.2 1.6 10⁻¹⁹ 1 1.6 10⁻²⁷ =0.2 10^8 ~m ~s ⁻¹