AP EAMCET201726 Apr 2017Morning ShiftPhysicsElectrostaticsActual
The uniform electric field intensity between the two plates of a parallel plate capacitor is 1 103 Vm ⁻¹ acting vertically upwards as shown in the figure. The plates are sufficiently long and have separation 2 ~cm . A particle of negative charge 1 C and mass 2 ~g is projected at an angle 45^ with the electric field from the lower plate with a velocity ' u '. The maximum velocity acquired by the particle, if it is not
Options
- A2 ~ms ⁻¹
- B1 ~ms ⁻¹
- C0.1 ~ms ⁻¹
- D0.2 ~ms ⁻¹
Correct answer
D. 0.2 ~ms ⁻¹
Step-by-step solution
We have, aligned & h_ = u^2 ^2 2 ( q E m ) [ Here g q E m ] & u^2= 2 h m q E m ^2 45^ u^2= 2 2 10⁻² 10⁻⁶ 10^3 2 10⁻³ 1 / 2 & u^2=0.04 u=0.2 ~m / s aligned