3) The figure below shows a cross-section of two large metal slabs (not drawn to scale). The slabs are 50 cm on a side, 1.0 cm thick, and spaced 2.0 cm apart. Slab 1 has charge to Q1 = + 10 nC, and slab 2 has charge Q, = - 5.0 nC. Point Plies 1.0 cm above slab 1. What is the strength and direction of the electric field at point P? A) 0 P B) 1100 N/C, up C) 2300 N/C, up D) 1800 N/C, down E) 2500 N/C, down9) A physics demonstration uses a cathode ray tube with electrodes spaced 12 cm apart. The average electric eld between the electrodes is 3500 V/m. Assume that electrons are released from rest at the negative electrode. What will the velocity of the electrons be when they reach the positive electrode? A) 0.70x 107 m/s B) 1.2>