A small object carrying a charge of -8.00 nC is acted upon by a downward force of 20.0 nN when placed at a certain point in an electric field. (a) What are the magnitude and direction of the elec￾tric field at the point in question? (b) What would be the magnitude and direction of the force acting on a proton placed at this same point in the electric field?

A proton is placed in an electric field pointing right. The field applies a 1x10-17 N force on the proton. What direction of force on the proton? (ii) the direction of force acting on an electron can you say about the placed in the same field? O (i) the direction of force on the proton is right; (ii) the direction of force on an electron is left. O None of the answer choices are correct. O The direction of force on a proton or an electron could be anything. It is impossible to predict it. We need more information about the electric field. O (i) the direction of force on the proton is left (ii) the direction of force on an electron is right. O (i) the direction of force on the proton is right; (ii) the direction of force on an electron is right.

If a +25µC charge experiences an electrostatic force with a magnitude of 1.2N pointing to the left, What is the magnitude of the electric field? What direction does the electric field point? Answer the same questions again if the charge was -25µC and the force pointed left.

A proton is released from rest in a uniform electric field of magnitude 403 N/C. (a) Find the electric force on the proton. magnitude      ?N direction         ?  (b) Find the acceleration of the proton. magnitude     ? m/s2 direction         ?  (c) Find the distance it travels in 2.18 ?s. ?? cm

1. (a) Calculate the strength and direction of the electric field, E, due to point charge of 1.8 nC at a distance 4.4 mm from the charge. For the direction, consider the line joining the point charge and point at the distance 4.4 mm. The direction on this line away from the charge is positive and the direction towards the charge is negative. E = 3677.7 X N/C (b) What force does the electric field found in the previous example exert on a point charge of -2.5-10-8 C? Hint: Indicate a force pointing in the direction of the field as positive and opposite the field as negative. F= -9.19-10-5X√ N

A uranium nucleus has a charge of 92e. (a) What is the direction and magnitude of the electric field due to the nucleus at a distance of 10-12 m from the nucleus? (b) What is the direction and magnitude of the force on an electron at this distance?

A proton is released from rest in a uniform electric field of magnitude 400 N/C. (a) Find the electric force on the proton. magnitude direction ---Select--- (b) Find the acceleration of the proton. magnitude m/s? direction ---Select--- (c) Find the distance it travels in 1.84 µs. cm

A proton is released from rest in a uniform electric field of magnitude 385 N/C. Find (a) the electric force on the proton, (b) the acceleration of the proton, and (c) the distance it travels in 2.00 μs.

A particle of mass m = 1.0 g and charge 2.0 µC is placed in a region of space that has a constant electric field of magnitude 2000 N/C. What is the magnitude of the force exerted on the particle due to the electric field? O 4 x 103 N O 2N O 4N O 1000 N 2000 N O 4000 N 2 x 10° N O 1x 10° N

The charge per unit length on a long, straight filament is -93.3 µC/m. (a) Find the electric field 10.0 cm from the filament, where distances are measured perpendicular to the length of the filament. (Take radially inward toward the filament as the positive direction.) MN/C(b) Find the electric field 40.0 cm from the filament, where distances are measured perpendicular to the length of the filament. MN/C(c) Find the electric field 120 cm from the filament, where distances are measured perpendicular to the length of the filament. MN/C