What is the electric potential at a point 0.3m away from a charge of +4μC?

What is the electric potential at a point 0.3m away from a charge of +4μC?

Correct Answer: 12000 V

Step 1: Identify the formula for electric potential (V) due to a point charge, which is V = k * q / r.
Step 2: Understand the variables in the formula: k is the electrostatic constant (approximately 9 × 10^9 N m²/C²), q is the charge (in this case, +4μC or +4 × 10^-6 C), and r is the distance from the charge (0.3m).
Step 3: Substitute the values into the formula: V = (9 × 10^9) * (4 × 10^-6) / 0.3.
Step 4: Calculate the numerator: (9 × 10^9) * (4 × 10^-6) = 36,000.
Step 5: Divide the result by the distance (0.3): 36,000 / 0.3 = 120,000.
Step 6: The final result is the electric potential at the point, which is 120,000 V.

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