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3. Two point charges of equal magnitude are 8.0 cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 45 N/C. a. Do the charges have the same or opposite signs? explain b. Find the magnitude of the charges. 4. An electric field of 4.7 x 104 N/C exerts a force of 0.73 N on a charged object. The force is opposite in direction to the electric field. a. What is the sign of the charge on the object? b. What is the magnitude of the charge on the object? 5. Two point charges lie on the x-axis. A charge of +6.8 µC is at the origin, and a charge of -8.5 µC is at x = 12 cm. What is the magnitude and direction of the total electric field at x = 4.0 cm? (you must draw a diagram)

3. Two point charges of equal magnitude are 8.0 cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 45 N/C. a. Do the charges have the same or opposite signs? explain b. Find the magnitude of the charges. 4. An electric field of 4.7 x 104 N/C exerts a force of 0.73 N on a charged object. The force is opposite in direction to the electric field. a. What is the sign of the charge on the object? b. What is the magnitude of the charge on the object? 5. Two point charges lie on the x-axis. A charge of +6.8 µC is at the origin, and a charge of -8.5 µC is at x = 12 cm. What is the magnitude and direction of the total electric field at x = 4.0 cm? (you must draw a diagram)

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3. Two point charges of equal magnitude are 8.0 cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 45 N/C. a. Do the charges have the same or opposite signs? explain b. Find the magnitude of the charges. 4. An electric field of 4.7 x 104 N/C exerts a force of 0.73 N on a charged object. The force is opposite in direction to the electric field. a. What is the sign of the charge on the object? b. What is the magnitude of the charge on the object? 5. Two point charges lie on the x-axis. A charge of +6.8 µC is at the origin, and a charge of -8.5 µC is at x = 12 cm. What is the magnitude and direction of the total electric field at x = 4.0 cm? (you must draw a diagram)
Transcribed Image Text:3. Two point charges of equal magnitude are 8.0 cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 45 N/C. a. Do the charges have the same or opposite signs? explain b. Find the magnitude of the charges. 4. An electric field of 4.7 x 104 N/C exerts a force of 0.73 N on a charged object. The force is opposite in direction to the electric field. a. What is the sign of the charge on the object? b. What is the magnitude of the charge on the object? 5. Two point charges lie on the x-axis. A charge of +6.8 µC is at the origin, and a charge of -8.5 µC is at x = 12 cm. What is the magnitude and direction of the total electric field at x = 4.0 cm? (you must draw a diagram)
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