The procedure for giving an electroscope a positive charge by conduction involves the following steps:
1. Start with a neutral electroscope (with no excess charge) and a positively charged object, such as a glass rod that has been rubbed with silk or a positively charged polyethylene strip.
2. Secure the electroscope on a non-conductive surface or stand.
3. Ground the electroscope by touching its metal stem with your finger. This will establish a connection with the ground, allowing any excess charges to flow to or from the ground as necessary.
4. Bring the positively charged object near (but not touching) the metal cap or top of the electroscope without removing your finger from the metal stem. This will cause the electrons in the electroscope to be attracted to the charged object, leaving a net positive charge on the electroscope.
5. While still holding the charged object near the electroscope, remove your finger from the metal stem. This will break the connection to the ground, trapping the positive charge on the electroscope.
6. Slowly move the positively charged object away from the electroscope. The leaves (thin metal foils) at the bottom of the electroscope will repel each other due to the presence of the positive charge. The greater the positive charge, the more the leaves will repel each other.
7. The electroscope is now positively charged by conduction. You can use this charged electroscope to investigate the nature of the charges present in other objects by bringing them close to the electroscope and observing whether the leaves repel or attract each other further.
what is the procedure for giving an electroscope a positive charge by conduction?
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