The strength of the electric field (E) at the position indicated by the dot can be obtained with the formula: E = F/q where;
F = Force exerted per unit and
q = Positive electric charge at that point.
<h3>What is the Strength of an Electric Field?</h3>
The strength of an electric field, E refers to the force exerted per unit positive charge. It is indicated by the formula: E = F/q. Its SI unit is Newton per Coulomb or Volts per Meter (V/M).
Note that the strength of an electric field is strongest where the lines are close and weakest when the lines are further apart.
The complete question is not provided but the above formula can be used in arriving at the answer.
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The number of electrons passes through 20 ohms resistor in 10 minutes is 5.625e+21.
<h3>What is a resistor?</h3>
In an electronic circuit, a resistor is an electrical component that limits or regulates the flow of electrical current.
Given, the resistance is 20 ohms.
The potential difference is 30 volts
Time is 10 minute
By the formula of current

The charge flowing through the resistor is 1.5 C/s
1 electron charge is 1.6e+19
Now, the number of electrons passing through a 20 ohms resistor is

In 10 minutes

Thus, the number of electrons passes through 20 ohms resistor in 10 minutes is 5.625e+21.
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