The figure shows three situations when an electron with velocity vec v travels through a uniform magnetic field vec B . In each case, what is the direction of magnetic force on the electron?

Question

The figure shows three situations when an electron with velocity vec v travels through a uniform magnetic field vec B . In each case, what is the direction of magnetic force on the electron? (A) +ve z-axis, -ve x-axis, +ve y-axis (B) -ve z-axis, -ve x-axis and zero (C) +ve z-axis, +vey-axis and zero (D) -ve z-axis, +ve x-axis and zero

Tardigrade Admin · Accepted Answer

According to Fleming's left hand rule, in figures (1) and (2) magnetic force on the electron will be directed in -ve z-axis and -ve x-axis respectively. In figure (3) velocity of electron and direction of magnetic field are antiparallel, so no force will act on electron.

Q. The figure shows three situations when an electron with velocity $v$ travels through a uniform magnetic field $B$ . In each case, what is the direction of magnetic force on the electron?

+ve z-axis, -ve x-axis, +ve y-axis

-ve z-axis, -ve x-axis and zero

+ve z-axis, +vey-axis and zero

-ve z-axis, +ve x-axis and zero

According to Fleming's left hand rule, in figures (1) and (2) magnetic force on the electron will be directed in -ve $z$ -axis and -ve $x$ -axis respectively. In figure (3) velocity of electron and direction of magnetic field are antiparallel, so no force will act on electron.

Q. The figure shows three situations when an electron with velocity v travels through a uniform magnetic field B. In each case, what is the direction of magnetic force on the electron?