Question

A $e^-$ when accelerated by $V$ volts experiences a force $F$ when it enters a uniform magnetic field. What will the force experience when it is accelerated by $2V$ volts ?

• A. $F$
• B. $2F$
• C. $\frac {F}{2}$
• D. $\sqrt 2F$

Answer 1

Answer: (D)

$\sqrt 2F$

Answer 2

The correct option is (D): $\sqrt 2F$.