Question

i know ans but I want method to solve this problem.... please help me guys it's very urgent and very important​

Answer 1

12th/Physics

Moving charge and Magnetism

Question :

A charge with 10‾¹¹ Cb and 10‾⁷ kg mass moving with a velocity of 10⁸ m/s along x-axis. A uniform static magnetic field of 0.5T is acting along y-axis. The magnetic force (magnitude and direction) on charge

Answer :

★ Force on a charge q moving with velocity v in a magnetic field B is given by

• F = q (v × B)

ATQ,

• v = 10⁸ i m/s
• B = 0.5 j T

⭆ F = q (v × B)

⭆ F = 10‾¹¹ (10⁸ i × 0.5 j)

We know that, i × j = k

⭆ F = 5 × 10‾⁴ N along z-axis

∴ (B) is the correct answer$.$

Cheers!