An electron (mass 9 imes 10^{-31} {\kg} and charge 1.6 imes 10^{-19} {\C} ) moving with speed c / 100(c= speed of light) is injected into a magnetic field \overrightarrow{B} of magnitude 9 imes 10^{-4} {\T} perpendicular to its direction of motion. We wish to apply an uniform electric field \overrightarrow{E} together with the magnetic field so that the electron does not deflect from its path. Then (speed of light c=3 imes 10^8 {\ms}^{-1} ) [NEET 2025]

Question

An electron (mass 9 	imes 10^{-31} {\kg} and charge 1.6 	imes 10^{-19} {\C} ) moving with speed c / 100(c= speed of light) is injected into a magnetic field \overrightarrow{B} of magnitude 9 	imes 10^{-4} {\T} perpendicular to its direction of motion. We wish to apply an uniform electric field \overrightarrow{E} together with the magnetic field so that the electron does not deflect from its path. Then (speed of light c=3 	imes 10^8 {\ms}^{-1} ) [NEET 2025]

Examsnet · Accepted Answer

Correct Answer is : ‌‌→E is perpendicular to →B and its magnitude is 27×102Vm−1

Class 12 NEET Physics Moving Charges and Magnetism