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An object with a charge of -2.7 μC and a mass of 4.7×10−2 kg experiences an...

An object with a charge of -2.7 μC and a mass of 4.7×10−2 kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight.

Find the magnitude of the electric field.

If the electric charge on the object is doubled while its mass remains the same, find the direction and magnitude of its acceleration.

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Answer #1

Weight of the body is,

Considering the electric force to be same,

This is the magnitude of the Elecrtic field.

If the charge is doubled while the mass remains same, then the electric force would be doubled. But since the weight of the body is same (because mass is same), therefore effective force on the body would be acting upwards due to the electric force only. Magnitude of the force would be just the same as its weight. So, aceleration of the body would be,

Acceleration would be acting upwards.

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