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1. An electron is vibrated from the lower of 2 large parallel plate, separated by a distance of 20mm the upper plate has a potential of 2400v relative to the lower, how long does the electron take to reach it. Assume the charge mass ratio (e/m) for the electron is 1.8*E11 CKg. 2. A negative charge of 6.0*E-6 Coulomb extents an attraction force of 65N on a second charge of 0.050m away. What is the magnitude of the second charge (Permittivity in free space= 8.854*E12 F/M. 3. A point charge of E-9 Coulomb is place at a point A in free space. I. Calculate The intensity of electrostatic field on the surface of sphere of a radius 5cm and centre A. II. Calculate the different of potential between the two point 20cm and 10cm away from the charge at A. 4. A parallel plate capacitor has plate of 0.15mm apart and dielectric with relative Permittivity of 3. Find the electric field intensity and the voltage between the plate if the surface is 5*E-4 micrometer coulomb/Cm²
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