STANDARDPhysics-Current Electricity
STANDARD Physics Mobility MCQ Question
Type: MCQ-numerical-Medium-Class 12
A charged particle having drift velocity of 7.5 × 10⁻⁴ m s⁻¹ in electric field of 3 × 10⁻¹⁰ V m⁻¹, mobility is
A
6.5 × 10⁶ m² V⁻¹ s⁻¹
B
2.5 × 10⁶ m² V⁻¹ s⁻¹
C
2.5 × 10⁴ m² V⁻¹ s⁻¹
D
6.5 × 10⁴ m² V⁻¹ s⁻¹
Correct Answer
Option B
Detailed Explanation
Mobility (μ) is calculated as μ = vₐ/E. Substituting the given values, μ = (7.5 × 10⁻⁴) / (3 × 10⁻¹⁰) = 2.5 × 10⁶ m² V⁻¹ s⁻¹.
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