CHARGING BY

INDUCTION &

CONDUCTION

STARRING

THE ELECTROSCOPE

+

+

+

+ +

+ +

- --

- -- -

Neutral Electroscope

Charges are balanced

+

+

+

+ +

+ +

- -

- -- -

-

No Reaction

Neutral rod brought near

--++

+-

+

+

+

+ +

+ +

- -

- -- -

-

Negative charge by Induction

Negative rod brought near

--

--

-- --+

++

-

+

+

+

+ +

+ +- -

- -

- -

-

Temporary Dipolar charge

Same charges repel

--++

+-

--

--

-

Electrons move down to leaves

Leaves become negative

--++

+-

--

--

- --

--

--

+

+

+

+ +

+ +- -

- -

- -

-

Remove negative rod

Leaves will collapse

+

+

+

+

+

+ +

+ +

- --

- -- -

Back to Neutral Electroscope

+

+

+

+ +

+ +

- -

- -- -

-

Positive Charge by Induction

Positive rod brought near

-+

++

+

+

+

+ +

+ +

---- --

-

Temporary Dipolar ChargeSame charges repel

Electrons move up to sphere

Leaves become positive

-+

++

+

+

+

+ +

+ +

---- --

-

Leaves will collapse

Remove positive rod

+

+

+

+ +

+ +

- --

- -- -

Back to Neutral Electroscope

+

+

+

+ +

+ +

--

- -- -

Negative Charge by Conduction

Negative rod makes contact

--

-- -

--- -+

+- - -

+

+

+

+ +

+ +- -

- -- -

-

+++ -

+ +

+ +-

-

-

-

-

-- -

- -

-

-

-

--

--

--

Electrons are added

Creates a Bridge

Like charges repel

Leaves become negative

--

-- -

--- -+

+- -

+

+

+

+ +

+ +- -

- -- -

-+ +

+ +-

- ---

-- -

- -

-

--

-- -

--

-

Permanent Negative Charge

Remove Negative Rod

Like charges still repel

Leaves stay negative

+

+

+

+ +

+ +- -

- -

--

-+ +

+ +

-- -

-

--

- -- -

-

-

-

--- -

--- ---

-

Ground Negative Charge

Touch sphere with finger Extra Electrons are removed

+

+

+

+ +

+ +

- --

- -- -

Back to Neutral Electroscope

Charges are Balanced

+

+

+

+ +

+ +

- -

- -- -

-

Positive Charge by Conduction

Positive rod makes contact

-+

++

+

+

+

+ +

+ +

--

Electrons are removed

Creates a bridge

Like charges repel

Leaves become positive

-+

++ - -- -- -

- -

+

+

+

+ +

+ +

--

Permanent Positive Charge

Remove positive rod

Like charges still repel

Leaves stay positive

+

+

+

+ +

+ +

--

Ground Positive Charge

Touch sphere with finger Electrons are replaced

- - - - -

+

+

+

+ +

+ +

- --

- -- -

Back to Neutral Electroscope

Charges are Balanced