Giancoli, Physics : Principles with Applications, 5/E Chapter 16 -- Physlet® Problems

Chapter 16: Electric Charge and Electric Field
Physlet® Problems

Five unknown charges are shown on the screen along with vectors representing the forces on each charge. How many charges have like signs? You can click-drag on any charge to change its position. Start

Four charges are alike. One is different

Three charges are alike. Two are different.

All the charges are alike.

Insufficient information. The sign of one charge must be given.

Two fixed charges are shown in black. Drag the small green test charge around the screen and observe how the force vector changes magnitude and direction. What are the magnitude and sign of the charge on the right if the fixed charge on the left has a value of +3 uC? Start

-3 uC

-2 uC

+2 uC

+3 uC

A fixed particle is shown in the animation along with a draggable particle having a charge of 1 uC. The vector represents the force on the draggable particle and the message box displays the magnitude of this force as you drag the particle. The force on the fixed particle is not shown but you know it exists from Newton's third law. Is the force acting between the two particles a Coulomb force? If so, what is the charge on the fixed particle? Start

1 C.

-1 C

Insufficient information.

The force is not a Coulomb force.

Three negatively charged particles are shown in orbit about a massive heavily charged center? What is the charge at the center if the orbiting particles each have a charge of -1 nC (nanoCoulomb) and a mass of 1 microgram? Assume that the time is shown in microseconds and that distance is measured in millimeters when you click-drag inside the animation. Start

1.2 uC

1.4 uC

1.6 uC

1.8 uC

A fixed particle with an unknown charge is shown. The vectors shown point in the direction of the electric field and the color of the vectors represent the field's magnitude. Measure the electric field's magnitude by click-dragging and observing the magnitude in the yellow message box. Distance is measured in m and electric field is measured in N/C. Determine the charge on the particle. Start

.39 nC

.41 nC

.43 nC

.45 nC

A 1 gram particle with a charge of -1 uC is fired into an unknown electric field as shown above. Find the magnitude of the electric field.Distance is measured in meters and time in seconds. Start

3.0 x 10 ³N/C.

3.2 x 10 ³N/C.

3.4 x 10 ³N/C.

3.6 x 10 ³N/C.

A one gram particle having a charge of 1 uC is fired into a uniform electric field. Find the magnitude of this electric field.Distance is measured in meters and time in seconds. Start

1500 N/C.

2000 N/C.

2500 N/C.

3000 N/C.

A 1 milligram particle with a charge of 2 uC is fired into an unknown electric field as shown above. Find the magnitude of the electric field. Start

1.5 N/C

2.0 N/C

2.5 N/C

3.0 N/C

Clicking inside the animation to draw a field line. Which of the following statements is true. (Note: Since you may draw as many field lines as you wish, the number of field lines will not be proportional to the magnitude of the charge as in the text.) Start

The net charge is zero.

There are two positive charges and one negative charge.

There are two negative charges and one positive charge.

All charges have the same sign.

10.

Two charges are shown in the animation. Click inside the animation to draw field lines and then decide which of the following statements is true. Start

Both charges have the same sign.

The charges are equal in magnitude but have opposite sign.

The magnitude of charge 2 is larger than the magnitude of charge 1.

11.

Four charged particles are shown in the animation. You can click drag any of these particles. If you overlap two charges, their charge values will add. Which of the following statements is true. Start

Two charges are positive and two are negative. Their magnitudes are equal.

The total charge is zero.

Charges 2 and 4 form a dipole.

All of the above.

Physlets used by permission of Wolfgang Christian, Davidson College. Physlet Problems ©Prentice Hall, Inc; written by Aaron Titus (North Carolina State University) and Wolfgang Christian, Davidson College.