Physics
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Two small charged spheres of charge q1 = 30 μC and q2 = 45 μC are 10 cm apart as shown in the image. Determine the net electric force exerted by the two spheres on a proton placed on the x-axis at i) x = 5 cm and ii) x = 15 cm.
Two tiny spheres of charge, qA = -30 nC, and qB = +60 nC, are placed at the corners A and B of a right triangle (OAB), as shown in the figure. Determine the magnitude and direction of the net electric field generated at O by these two spheres.
Two tiny spheres of charge, q1 = 2 μC and q2 = 3 μC are separated by a distance of 31 cm and lie along the horizontal axis. The sphere with charge q1 is on the left. Determine the electric field E vector at i) the midpoint between two charges and ii) 4 cm to the right of the charge q2.
A tiny particle of mass 5 × 10-15 kg and a charge of 4 nC is accelerated from rest between two oppositely charged flat parallel sheets where there is a constant horizontal electric field of +280 N/C. The two sheets are separated by a distance of 5.0 mm. Find the speed of the particle 1 μs after being released.
Two infinite parallel sheets of opposite charge are separated by 25.0 cm. An electron is released from rest at the surface of the negative sheet and reaches the positive sheet 3 μs later. What is the magnitude of the electric field (E) between the two sheets?
A -16 nC tiny metallic sphere is placed at one corner of a square of side length 25 cm as shown in the image. Find the electric-field vector produced at the opposite corner of the square.
A metallic sphere of charge q and mass 1 kg is released from rest at a height d above a large plate. What magnitude and sign of charge would make the sphere suspended in the air? The electric field due to the plate is approximately 150 N/C and points toward the plate.
Two knights wearing metallic armor are 60 m apart on a charged road. They float in the air using the road's electric field that points downward and has a magnitude of 350 N/C. One of the knights is uniformly charged with a charge of -2 C and the other one is charged with a charge of -1.5 C. i) Find the force of repulsion (F) between the two knights. ii) Is it possible that one of the knights flies towards the other using the road's electric field?
A thin nonconducting disk, a nonconducting ring, and a tiny sphere carry (each of them) a charge of 130 nC uniformly distributed over their surfaces. Assume the charge on the disk is located on one face. The disk and the ring have the same radius of 10 cm. Edisk is the field produced at point X1 located on the axis of the disk and at a distance of 30 cm from its center. Ering is the field produced at point X2 located on the axis of the ring and at a distance of 30 cm from its center. ESphere is the field produced at a point P3 30 cm away from the sphere. Compare Edisk , Ering and Esphere.