MHT CET202312 May 2023Evening ShiftPhysicsMagnetic Effects of CurrentActual
An electron makes a full rotation in a circle of radius 0.8 ~m in one second. The magnetic field at the centre of the circle is ( ₀=4 10⁻⁷ SI units )
Options
- A4 10⁻²⁶ ~T
- B2 10⁻²⁶ ~T
- C4 10⁻¹⁹ ~T
- D2 10⁻¹⁹ ~T
Correct answer
A. 4 10⁻²⁶ ~T
Step-by-step solution
aligned & = 2 T & I= q 2 = 1.6 10⁻¹⁹ 2 2 . ( I= q t ) & I=1.6 10⁻¹⁹ A aligned The magnetic field at the centre of the circle is: aligned & B = ₀ I 2 r = 4 10⁻⁷ 1.6 10⁻¹⁹ 2 0.8 & ~B =4 10⁻²⁶ ~T aligned