Q38. The force between two electric charges is expressed by the equation: F = k q1 92 / r². Which of

Q: What is the correct answer for CUET UG Physics Q38?

The correct answer is a. Coulomb's Law, F = k q₁q₂/r², quantitatively describes the electrostatic force between two stationary electric charges. (a) This equation fundamentally applies to point charges, meaning charges whose physical dimensions are negligible compared to the distance between them. For extended charge distributions, the force is typically found by integrating over the distribution or by approximating them

Q: Q38. The force between two electric charges is expressed by the equation: F = k q1 92 / r². Which of the following is a correct statement? (a) The equation applies to point charges (b) k is…

The correct answer is a. Coulomb's Law, F = k q₁q₂/r², quantitatively describes the electrostatic force between two stationary electric charges. (a) This equation fundamentally applies to point charges, meaning charges whose physical dimensions are negligible compared to the distance between them. For extended charge distributions, the force is typically found by integrating over the distribution or by approximating them

Q: What are the options for this CUET UG Physics question?

A. The equation applies to point charges · B. k is Boltzmann's constant · C. r is the radius of the spheres on which the two charges are placed · D. The equation can only be applied to uniform

Question

Q38. The force between two electric charges is expressed by the equation: F = k q1 92 / r². Which of the following is a correct statement?
(a) The equation applies to point charges
(b) k is Boltzmann's constant
(c) r is the radius of the spheres on which the two charges are placed
(d) The equation can only be applied to uniform

FirstInTest · Accepted Answer

Coulomb's Law, F = k q₁q₂/r², quantitatively describes the electrostatic force between two stationary electric charges. (a) This equation fundamentally applies to point charges, meaning charges whose physical dimensions are negligible compared to the distance between them. For extended charge distributions, the force is typically found by integrating over the distribution or by approximating them as point charges under specific conditions (e.g., uniformly charged spheres external to each other). Thus, this statement is correct. (b) The constant 'k' in Coulomb's Law is the Coulomb constant (k = 1/(4πε₀) ≈ 9 × 10⁹ N·m²/C²), which is distinct from Boltzmann's constant (k_B), used in thermodynamics. So, this statement is incorrect. (c) 'r' in the equation represents the distance between the two point charges, specifically their centers if they have extent but behave as point charges, not the radius of any spheres. So, this statement is incorrect. (d) The statement 'The equation can only be applied to uniform' is incomplete and vague; Coulomb's Law is not restricted in this manner. So, this statement is incorrect. Therefore, option (a) is the only correct statement.

Answer

The equation applies to point charges

Answer

k is Boltzmann's constant

Answer

r is the radius of the spheres on which the two charges are placed

Answer

The equation can only be applied to uniform

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