Edexcel Physics IGCSE Quiz

What is the purpose of the gold leaf electroscope in investigating insulating materials?

• To measure the charge of a balloon

• To stick a balloon to a wall

• To deflect a stream of water

• To show that a rod is charged

How can you charge a polythene rod according to the practical notes?

• Run the tap alongside a stream of water

• Rub it with a cloth to remove electrons

• Rub it with a cloth to deposit electrons

• Hold it near the plate of the electroscope

What causes a balloon to stick to a wall after being rubbed with a cloth?

• The balloon becomes uncharged

• The overall charge attracts opposite charges

• The cloth deposits electrons onto its surface

• The overall charge repels opposite charges

Why does the water deflect when a charged rod is held alongside the stream?

• The charged rod repels the water molecules

• The tap stops running water

• The charged rod attracts the water molecules

• The water molecules become uncharged

What is the key concept behind the deflection of the water stream?

• The water stream becomes thicker

• The rod becomes uncharged

• Charged molecules repel each other

• Opposite charges attract each other

How can you determine if a rod is charged using the gold leaf electroscope?

• Deflect a stream of water

• Hold it against the wall

• Touch the plate of the electroscope

• Rub it with a cloth