Small spheres a and b are attached by a 20cm long string. The charges on spheres a and b are 2. 4μc and 3. 6μc, respectively. The tension in the string holding them together is most nearly 0. 019n 0. 019 newton 0. 39n 0. 39 newton 1. 30n 1. 30 newtons 1. 94n 1. 94 newtons 2. 92n
