Question

You are given an uncharged electroscope and a charged body. No other apparatus is allowed. You can use the electroscope to
(a) only detect the charge.
(b) detect and measure the charge.
(c) detect, measure and find the nature of the charge.
(d) neither of these since the electroscope is uncharged.

Answer 1

(b) detect and measure the charge

We can only detect and measure charge using an uncharged electroscope and a charged body. To test the nature of the charge, we need another body with a known charge.