Electric force balances weight of ball near earths surface

Reference no: EM13677318

The electric field near the surface of Earth points downward and has a magnitude of 150 N/C. What is the ratio of the magnitude of the upward electric force on an electron to the magnitude of gravitational force on the electron?

What charge must be placed on a plastic ball of mass 3.06 g therefore that the electric force balances the weight of the ball near Earth's surface?

Reference no: EM13677318

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