An object with a charge of - 4.0 μc and a mass of 1.4*10-2 kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight. part a find the magnitude of the electric field. express your answer using two significant figures.

Question

Physics

Rudy Mcgee

8 June, 11:16

An object with a charge of - 4.0 μc and a mass of 1.4*10-2 kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight. part a find the magnitude of the electric field. express your answer using two significant figures.

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Answers (1)

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Hopkins · Answer 1

The formula that we will be using is:

Felec = qE = mg = > E = mg/q

So using the formula of E:

E = (0.014kg) (9.8 m/s^2) / - 4.0*10^-6C = 34,000 N/C

This is the magnitude of the field. The direction must be downward to give an upward force on a negative charge.