The figure below is an illustration of a series of electroscopes. In (i) the ele

Question

The figure below is an illustration of a series of electroscopes. In (i) the electroscope is neutral Then a positively charged rod is brought close to the charging plate of the electroscope (ii). Next the charging plate is touched with a finger (iii). The finger is then removed (iv) and finally the positively charged rod is removed (v). In parts (iii)-(v), dial on the electroscope is not shown. Now consider the following possible choices for the dial on the electroscope. Which choices best illustrate the position of the dial for parts (iii)-(v)? A. Part(iii): 1 Part(iv): 1 Part(v): 1 B. Part (iii): 1 Part(iv): 2 Part (v): 2 C. Part(iii): 1 Part(iv): 1 Part(v): 2 D. Part(iii): 2 Part(iv): 1 Part(v): 2 E. Part(iii): 2 Part(iv): 2 Part(v): 1

Explanation / Answer

The option is

(B) 1 2 2

Because when the finger is pulled close to the plate. It will be neutralized and then again when the positive charged rod is brought closer, it will charge similar to first figure

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