Question

Make a prediction for the results of your experiment using charged rods, where one is in the cradle and the other you hold close to the tip of the cradled rod?

Answer 1

In the first experiment, the rod is brought in contact with the electroscope using the conduction method, resulting in a net positive charge on the electroscope. In the second experiment, the electroscope is momentarily grounded while the rod is close, causing a temporary negative charge on the electroscope.

Step-by-step explanation:

a) In the first experiment, the charging method is conduction as the rod is brought in contact with the electroscope. In the second experiment, the charging method is induction as the rod is only brought close to the electroscope but not in contact.

b) In the first experiment, the net charge on the electroscope is positive. This is because when the positively charged rod comes in contact with the electroscope, some of its positive charge is transferred to the electroscope, resulting in a net positive charge.

c) The net charge on the electroscope in the second experiment is temporarily negative. This is because when the electroscope is momentarily grounded while the rod is close, the excess negative charge on the electroscope flows to the ground, leaving the electroscope with a temporary negative charge.