An oil drop with charge `1.6xx10^(-18)C` is balanced in air between two metallic plates 10 mm apart. Calculate the voltage required between the plates if mass of the drop is `2.4xx10^(-14)kg`.

Explanation

To solve the problem of calculating the voltage required between two metallic plates to balance an oil drop with a given charge and mass, we can follow these steps:

### Step 1: Identify the forces acting on the oil drop
The oil drop experiences two main forces:
1. The gravitational force (downward) given by \( F_g = mg \)
2. The electric force (upward) due to the electric field between the plates, given by \( F_e = EQ \)

### Step 2: Set the forces equal for balance
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