Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Moving Charges and Magnetism

Question:

An electron having charge $1.6×10^{-19} C$ and mass $9×10^{-31} kg$ is moving with $4 × 10^6 m/s$ speed in a magnetic field $2×10^{-1} T$ in a circular orbit. The force experienced by the electron and the radius of the circular orbit, respectively will be :

Options:

$1.28 × 10^{-14} N, 1.1×10^{-3} m$

$1.28 × 10^{-15} N, 1.2 × 10^{-12} m$

$1.28 × 10^{-13} N, 1.1×10^{-4} m$

$1.28 × 10^{-12} N, 1.1×10^{-5} m$

Correct Answer:

$1.28 × 10^{-13} N, 1.1×10^{-4} m$

Explanation:

The correct answer is Option (3) → $1.28 × 10^{-13} N, 1.1×10^{-4} m$