Question

Rubbing a balloon on your hair results in the balloon having a -1.93C charge. If you move the balloon 25 cm away from your hair, what is the electric field acting between the balloon and your hair? O 6.17 x 10 N/C O 2.78 x 10 N/C O 4.01 x 10s N/C O 4.67 x 10 N/C

Answer 1

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 :

$E=\dfrac{kq}{r^2}$

k = electrostatic constant

$E=\dfrac{9\times 10^9\ Nm^2/C^2\times 1.93\ C}{(0.25\ m)^2}$

$E=2.779\times 10^{11}\ N/C$

or

$E=2.78\times 10^{11}\ N/C$

Hence, this is the required solution.