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1. The two small plastic spheres shown in Fig. 2.12 are arranged so that they can slide freely along the insulating fiber. Each has a mass of 0.1 g. The spheres are given identical positive charges. (a) If the lower sphere is resting against the lower knot while the upper sphere moves to a location 6 cm distant from that knot, find the charge on each. (b) If the charges remain the same, what angle should the fiber make with the horizontal to double the separation?

1. The two small plastic spheres shown in Fig. 2.12 are arranged so that they can slide freely along the insulating fiber. Each has a mass of 0.1 g. The spheres are given identical positive charges. (a) If the lower sphere is resting against the lower knot while the upper sphere moves to a location 6 cm distant from that knot, find the charge on each. (b) If the charges remain the same, what angle should the fiber make with the horizontal to double the separation?

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PROBLEMS 1. The two small plastic spheres shown in Fig. 2.12 are arranged so that they can slide freely along the insulating fiber. Each has a mass of 0.1 g. The spheres are given identical positive charges. (a) If the lower sphere is resting against the lower knot while the upper sphere moves to a location 6 cm distant from that knot, find the charge on each. (b) If the charges remain the same, what angle should the fiber make with the horizontal to double the separation? 2. A charge Qo= 1 nC is located in free space at P(a,0,0). Prepare a sketch of the magni- tude of the force on Qo, as a function of a, 0≤ a ≤ 5 m, produced by two other charges, 2₁ 1 C at (0,1,0) and Q₂ =: (a) 1 C at (0,-1,0); (b) -1 ℃ at (0,-1,0). = KNOT 45° FIBER SLIDING SPHERES naw KNOT FIGURE 2.12 See Prob. 1.
Transcribed Image Text:PROBLEMS 1. The two small plastic spheres shown in Fig. 2.12 are arranged so that they can slide freely along the insulating fiber. Each has a mass of 0.1 g. The spheres are given identical positive charges. (a) If the lower sphere is resting against the lower knot while the upper sphere moves to a location 6 cm distant from that knot, find the charge on each. (b) If the charges remain the same, what angle should the fiber make with the horizontal to double the separation? 2. A charge Qo= 1 nC is located in free space at P(a,0,0). Prepare a sketch of the magni- tude of the force on Qo, as a function of a, 0≤ a ≤ 5 m, produced by two other charges, 2₁ 1 C at (0,1,0) and Q₂ =: (a) 1 C at (0,-1,0); (b) -1 ℃ at (0,-1,0). = KNOT 45° FIBER SLIDING SPHERES naw KNOT FIGURE 2.12 See Prob. 1.
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