When you rub a balloon on your hair electrons move from your hair to the balloon

Question

When you rub a balloon on your hair electrons move from your hair to the balloon. a. What happens to the charge of your hair (becomes more positive more negative or doesn't change)? Why? b. What happens to your when you hair when you bring the balloon near (but not touching) your hair? Why? 9. An object cannot have a charge of a. +1.6 x 10^-19 C b. -4.8 x 10^-19 C c. +5.2 x 10^-19 C d. +1.6 x 10^-18 C 10 A neutral balloon is rubbed on a sweater and gains 4500 electrons. Find the ' amount of the net charge of the balloon. Also state if it is positive or negative.

Explanation / Answer

(8).The charge move from Hair to balloon.i.e., hair looses some electrons.

So, hair becomes positively charged.

The balloon gains some electrons.

So, ballon becomes negatively charged.

(9).Charge is quantized.

i.e., charge is an integral multiples of (1.6 x10 -19 C)

Charge q = n(1.6 x10 -19 C)

Where n = ....,-3,-2,-1,0,1,2,3,.....

Option(C) is answer

(10) Net charge on balloon q = 4500 x charge of electron

                                         = 4500 x(-1.6 x10 -19 C)

                                         = -7.2 x10 -16 C

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