SNC1D
Lesson 2.1
CHARGING BY CONDUCTI ON
(C O N T A C T)
Electricity
AND INDUCTION
(N O C O N T A C T)
LEARNING GOALS
Students will:
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Distinguish between charging by friction, charging by conduction and charging by induction.
Understand how charge is transferred between objects being rubbed together and touched
together.
Key Terms
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Charging by friction
Electrostatic series
Charging by conduction
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Grounding
Charging by induction
Temporary charge
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Permanent charge
Electric discharge
Neutralizing
[IN CLASS]
Part A – Warm Up
1. Using the diagrams below, determine the charges on the objects and the electric force (attractive or
repulsive) between them.
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SNC1D
Charging by Friction
Lesson 2.1
Electricity

Rub or touch two ______________ objects together

Causes a transfer of ______________ from one object to another (because the materials of the objects
hold on to ________________ with different _________________)

One object becomes _______________ charged, and the other becomes positively __________

Use the __________________________________ to determine the charge each object acquires
The Electrostatic Series
To determine which substance will lose electrons and which substance will gain electrons, you use the
__________________________________. This table lists materials
in order of increasing tendency to ________________ electrons.
When charging by friction occurs, the substance
________________ in the list always loses electrons and becomes
________________________________ while the substance
________________ in the list gains electrons and becomes
________________________________.
1. Use pictures to show what happens when:
a) An acetate strip is rubbed with cat fur
b) An ebonite rod is rubbed with silk
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SNC1D
c) An rubber is rubbed with rubber
Lesson 2.1
Electricity
d) An silk is rubbed with zinc
Real Life Examples of Charging by Friction
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When a balloon is rubbed against you hair, the balloon would ______________ from your hair. The
balloon then becomes ______________ charged. Your hair would become ______________ charged because
it ______________ electrons. This will cause your hair to stand on end because like charges
______________ each other.
WHY? The balloon had a stronger attraction for electrons that your hair. Therefore, the balloon took
the electrons from your hair.
Charging objects by friction is easier on a ______________ day compared to a ______________ day. On a
humid day, water molecules can collide with a nearby charged object and pick up ______________ from
the charged object. In dry weather, the air has fewer ____________________________ and a charged object
has less of a chance of colliding with a water molecules and losing its charge.
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