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NEET 2024
Exam
NEET
Year
2024
Subject
Physics
Chapter
Electrostatics

NEET 2024 · Physics · Electrostatics

The value of electric potential at a distance of 9 cm from the...

The value of electric potential at a distance of 9 cm from the point charge 4×10−7C4 \times 10^{-7} \mathrm{C} is \left[\right.Given14πε0=9×109 N m2C−2]Given \left.\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9 \mathrm{~N} \mathrm{~m}^2 \mathrm{C}^{-2}\right] :

Options

  1. A4×102V4 \times 10^2 V
  2. B44.4 V
  3. C4.4×105 V4.4 \times 10^5 \mathrm{~V}
  4. D4×104 V4 \times 10^4 \mathrm{~V}

Correct answer

D. 4×104 V4 \times 10^4 \mathrm{~V}

Step-by-step solution

V=kqrV=\frac{k q}{r} =9×109×4×10−79×10−2=9 \times 10^9 \times \frac{4 \times 10^{-7}}{9 \times 10^{-2}} =4×104 V=4 \times 10^4 \mathrm{~V}
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