Explanation:
It is given that,
Charge acquired on rubbing a balloon on your hair, q = -1.93 C
If you move the balloon 25 cm away from your hair, r = 25 cm = 0.25 m
Electric field acting between the balloon and your hair is given by :
[tex]E=\dfrac{kq}{r^2}[/tex]
k = electrostatic constant
[tex]E=\dfrac{9\times 10^9\ Nm^2/C^2\times 1.93\ C}{(0.25\ m)^2}[/tex]
[tex]E=2.779\times 10^{11}\ N/C[/tex]
or
[tex]E=2.78\times 10^{11}\ N/C[/tex]
Hence, this is the required solution.
