| ASSERTION: Electric force acting on a proton and an electron, moving in a uniform electric field is same, where as acceleration of electron is 1836 times that of a proton. |
| REASON: Electron is lighter than proton. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
As \[F=qE\], and charge (q) on an electron and on a proton has the same magnitude therefore force F on each is same. Now acceleration \[a=\frac{F}{m}\]. Mass of electron is \[\frac{1}{1836}\]mass a proton. Therefore acceleration of electron is 1836 lames that of a proton.
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