4.1.2 Transfer of Charge

4.1.2 Transfer of Charge

​Conductive Properties of Materials

​Charging by Friction

​•Rub two insulators together

•ELECTRONS move from one to the other

•One object becomes + the other -

​Rule #1 - Only move

​Jump to slide 4 & 5 of ppt

​

Open Ended

Give a brief description of what you saw in the 2 videos and an electrostatic explanation of what happened

​Lightning

​Charging by Friction!!!

​

​Ice falling becoming negative

​Water vapor rising becoming positive

​

​Cloud becomes polarized

​Top +, bottom -

​Grounding: Jump to slide 7 of ppt

​Watch this youtube before advancing to next slide

​

​https://www.youtube.com/watch?v=lMgx_r8tb8U

Open Ended

Lightning Rods: After seeing the image and watching the cymatics video, explain how a lightning rod works in order to protect the building. HINT: It involved grounding

Fill in the Blanks

Rule #2: Grounding makes an object

​Jump to slide 9 & 10 of ppt

​

Multiple Choice

After seeing the induction animation on the latest ppt slide. Which of the following is a true statement for rule #3

• Electrons flow towards more negative/less positive areas

• Electrons flow towards less negative/more positive areas

• Protons flow towards less negative/more positive areas

• Protons flow towards more negative/less positive areas

​Jump to slide 11 & 12 of ppt

Multiple Choice

Finish the rule. Rule #5: Charging by conduction gives the charge

• Same

• Opposite

• Neutral

• Grounded

​Jump to slides 13-19 for electroscope animations

​

Multiple Choice

• 1

• 2

• 3

• 4

Multiple Choice

The electroscope shown in the diagram below is made completely of metal and consists of a know, a stem, and leaves. A positively charged rod is brought near the knob of the electroscope and then removed. The motion of the leaved results from electrons moving from the

• Leaves to the knob, only

• Knob to the leaves, only

• Leaves to the knob and then back to the leaves

• Knob to the leaves and then back to the knob

Multiple Choice

A metal sphere, X, has an initial net charge of -6E-6 C and an identical sphere, Y, has an initial net charge of +2E-6 C. The spheres touch each other and then separate. What is the net charge on sphere X after the spheres have separated?

• 0C

• -2E-6 C

• -4E-6 C

• -6E-6 C