how insulators become charged

Insulators do not conduct…

Heat or electricity

What happens to the polythene rod and the cloth when they are rubbed together?

They become (electrostatically) charged

What causes the electrons to be transferred from the surface of the cloth to the polythene rod?

Friction

The cloth becomes _____ charged and the polythene rod becomes _____ charged.

Positively, negatively

do the charges of the rod and cloth “cancel” eachother out?

Yes

If the rod is a perspex rod, what happens to the charges?

They are reversed (cloth is negative and rod is positive)

When you rub the balloon against the jumper, the balloon becomes ______ charged due to ______.

Negatively, friction

Does the balloon become negatively or positively charged after being rubbed against the jumper?

Negatively charged

What is “charging by induction”

a way of charging an object without touching it.

It works by using a nearby charged object to move charges around in another object.

Charging by induction is a way of ______ an object without _______ it.

It works by using a ____ charged object to _____ charges _____ in another object.

Charging, touching, nearby, move, around

How does induction cause the balloon to stick to the wall?

When a charged object (like a negatively charged balloon) is brought close to a neutral object (the wall):

• The charges inside the neutral object separate slightly

• This is called polarisation

• Opposite charges are pulled closer, like charges are pushed away

Induction causes the balloon to stick to the wall because:-

• The charges inside the neutral object (___) _______ slightly

• This is called ________

• Opposite charges are _____ closer, like charges are pushed _____.

Wall, separate, polarisation, pulled, away