Question: An oil drop whose mass is 2.8 Ã 10-15 kg is held at rest between two large plates separated by 1.0 cm (Fig. 27-3), when

An oil drop whose mass is 2.8 Ã— 10-15 kg is held at rest between two large plates separated by 1.0 cm (Fig. 27-3), when the potential difference between the plates is 340 V. How many excess electrons does this drop have?

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