www.bbcnoun.com.ng 1. Two parallel metal plates are 0.50 cm apart and are connected to a 90-volt battery. Calculate the electric field between them. 18000 V/m 2. what is the electricity 9×106 V 3. The HCl molecule has a dipole moment of about 3.4×10-30 Cm. The two atoms are separated by about 1.0×10-10 m. Calculate the maximum torque that the dipole would experience in an electric field of intensity 2.5×104 N/C. 8.50×10-26 Nm 4. Two large horizontal, parallel metal plates are 2.0 cm apart in air and the upper plate is maintained at a positive potential relative to the lower plate so that field strength between them is 2.5×105 Vm-1. An electron is released from rest at the lower plate. What is its speed on reaching the upper plate? [e=1.6×10-19C;me=9.1×10-31kg] 4.2x107m/s 5. 8.00 N/C 6. Which of the following correctly gives the electric field at a distance R above an infinitely long line of charge with constant linear charge density λ? λ2πRϵ0 7. A glass rod is rubbed against silk material acquires a charge of 0.6 μC. How many electrons are transferred from the glass rod to the silk material? [e=1.6×10-19 C] 3.75×1012 8. An electric field has a magnitude of 400 N/C and makes an angle 60o with the perpendicular to the surface of a flat surface of dimensions 30 cm by 20 cm. Calculate the electric flux through the surface. 12 Nm2C-1 9. Calculate the magnitude of the repulsive force between a +500μC charge and a +100μC charge which are 5 m apart. [k=9×109 Nm2C-1] 18.00 N 10. Calculate the electric field at x = 2 given the electric potential at this point is ϕ=3x3. -36i^ N/C