KCET2022PhysicsCurrent Electricity
A charged particle is moving in an electric field of 3 10⁻¹⁰ Vm ⁻¹ with mobility 2.5 10^6 ~m ^2 / V -s, its drift velocity is
Options
- A8.33 10⁻⁴ ~m / s
- B25 10^4 ~m / s
- C1.2 10⁻⁴ ~m / s
- D7.5 10⁻⁴ ~m / s
Correct answer
D. 7.5 10⁻⁴ ~m / s
Step-by-step solution
Given, electric field, E=3 10⁻¹⁰ Vm ⁻¹ Mobility, =25 10^6 ~m ^2 / V - s If drift velocity is v_d , then we know that aligned & = v_d E v_d= E & =25 10^6 3 10⁻¹⁰=7.5 10⁻⁴ ~m / s aligned