Question

A charge q = + 2mC enters a uniform magnetic field

tesla while travelling along positive x-axis. The magnetic field exists in the region x = 0 and x = 2m. The particle emerges from magnetic field region such that its deviation from initial direction is 60ŗ. Magnitude of linear momentum of particle is –

• A.
  2. 4 × 10^–9 kg m/s
• B. 1.6 × 10^–8 kg m/s
• C. 1.2 × 10^–6 kg m/s
• D. 3.2 × 10^–9 kg m/s

Answer 1

Answer: (B)

1.6 × 10^–8 kg m/s

Answer 2

sin d = sin 60 =

\ P = $\frac { 2 \times 2 \times 10 ^ { - 6 } \times 2 \sqrt { 3 } \times 10 ^ { - 3 } \times 2 } { \sqrt { 3 } }$

= 10 × 10^–9 = 1.6 × 10^–8 kg m/s