JEE Main 2022 · 25 Jul · Shift 1 · Physics Q41

← JEE Main 2022 · 25 Jul · Shift 1

PhysicsSingle correct+4 / -1Question 41 of 90

Two charged particles, having same kinetic energy, are allowed to pass through a uniform magnetic field perpendicular to the direction of motion. If the ratio of radii of their circular paths is 6 : 5 and their respective masses ratio is 9 : 4. Then, the ratio of their charges will be :

8 : 5

5 : 4

5 : 3

8 : 7

Answer and worked solution

Official answer: B

Radius $r=\dfrac{\sqrt{2mK}}{qB}$ , so $q\propto\dfrac{\sqrt m}r$ : $\dfrac{3/2}{6/5}=\dfrac54$ .

(B)

Topics:Motion in magnetic and electric fields

← Previous question Next question →

JEE Main 2022 · 25 Jul · Shift 1, Physics question 41