SME
Grade 11 Science · Problem type
Charged by friction, conduction or induction?
Use this for “A charged rod is held near a metal can without touching it, and the can rolls toward it. Why?”
Sort
How do its charges move?
Tap a card, then tap its group.
Assumptions
•
Charge is never made or destroyed: electrons move from one object to another.
•
Friction rubs electrons off one material onto another; conduction shares charge by touch.
•
Induction moves charges within an object by a nearby charge, without touching.
← Previous lesson
The field between charged plates
Next lesson →
Electric potential, voltage and capacitors
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.
Refresh
Related lessons
Static electricity: charge, Coulomb's law and electric fields
Main lesson
The field of a point charge
Use this for “What is the electric field 0.30 m from a +2 μC charge, and the force on a 1 μC test charge there?”
The field between two charges
Use this for “A +4 μC and a −2 μC charge are 0.5 m apart. What is the electric field 0.2 m from the +4 μC charge?”
The field between charged plates
Use this for “Two plates 3 mm apart have 12 V across them. What is the field between them, and the force on an electron there?”