A 10 µC charge is at the origin. A -15 µC charge is on the x-axis 10 cm to the right of the origin. At what point other than at infinity can a 1 µC charge be placed so that there will be no net electrostatic force on it?
A. At one point on the x-axis to the left of the positive charge
B. At one point between the two charges
C. At some point off the x-axis either above or below
D. At one point on the x-axis to the right of the negative charge
E. At no point
Answer: A
You might also like to view...
The smallest unit of life that can survive and reproduce on its own is a(n):
a. atom b. cell c. molecule d. organ e. population
The primary purpose of a particle accelerator is to
A) make small particles go very fast. B) make small particles achieve large accelerations. C) create particles and study their behavior. D) produce energy for commercial use. E) test new ideas about the law of gravity.
A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV. What is the threshold frequency for photoelectron production? (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 7.6 × 1014 Hz B) 8.5 × 1014 Hz C) 2.7 × 1014 Hz D) 9.4 × 1014 Hz E) 6.8 × 1014 Hz
A stone is thrown with an initial speed of 15 m/s at an angle of 53° above the horizontal from the top of a 40-m building. If g = 9.8 m/s2 and air resistance is negligible, then what is the magnitude of the horizontal component of velocity as the rock strikes the ground?
a. 7.5 m/s c. 12 m/s b. 9.0 m/s d. 29 m/s