Answer to Question #121191 in Physics for shahzad

Question

how to detect positive or negative charge without electroscope

Answer 1

With a piece of rubber: rub it with your hair or wool. Draw the rubber close to the object of unknown charge. If the objects attracts, it is positive, if the object repels, it is negative.

With a piece of glass: rub it with wool. Draw the glass close to the object of unknown charge. If the objects attracts, it is negative, if the object repels, it is positive.