In millikan experiments and Oil Drop of radius10 -4 cm remain suspended between the plates which are 1cm apart.i f the drophas charge over it calculate the potential difference between the plates .the density of oil may be taken as 1.5gcm -3 .

Question

Eshan · Answer

Dear student,

The amount of charge over the drop is not given. However for $q$ amount of charge, the electric force on the drop must be equal to its weight.
Electric field between the plates= $E=\dfrac{V}{d}$

Hence electric force on drop= $qE=q\dfrac{V}{d}=mg=\rho(\dfrac{4}{3}\pi r^3)g$
$\implies V=\dfrac{4\pi \rho r^3 gd]}{3q}$

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In millikan experiments and Oil Drop of radius10 -4 cm remain suspended between the plates which are 1cm apart.i f the drophas charge over it calculate the potential difference between the plates .the density of oil may be taken as 1.5gcm -3 .

In millikan experiments and Oil Drop of radius10^-4cm remain suspended between the plates which are 1cm apart.i f the drophas charge over it calculate the potential difference between the plates .the density of oil may be taken as 1.5gcm^-3.

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In millikan experiments and Oil Drop of radius10 -4 cm remain suspended between the plates which are 1cm apart.i f the drophas charge over it calculate the potential difference between the plates .the density of oil may be taken as 1.5gcm -3 .

In millikan experiments and Oil Drop of radius10-4cm remain suspended between the plates which are 1cm apart.i f the drophas charge over it calculate the potential difference between the plates .the density of oil may be taken as 1.5gcm-3.

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In millikan experiments and Oil Drop of radius10^-4cm remain suspended between the plates which are 1cm apart.i f the drophas charge over it calculate the potential difference between the plates .the density of oil may be taken as 1.5gcm^-3.