Question 1
A teacher wishes to show the production of electrostatic charges.
She holds a rod and rubs it with a cotton cloth. A copper rod, a glass rod, a plastic rod and a steel rod are available.
Which two rods would both be suitable to use?
A
a copper rod and a glass rod
B
a glass rod and a plastic rod
C
a plastic rod and a copper rod
D
a plastic rod and a steel rod