A proton and an electron are placed in a uniform electric field. - Vidyadip

MCQ

A proton and an electron are placed in a uniform electric field.

A
The electric forces acting on them will be equal.
✓
The magnitudes of the forces will be equal.
C
Their accelerations will be equal.
D
The magnitudes of their accelerations will be equal.

✓

Answer

Correct option: B.

The magnitudes of the forces will be equal.

b. The magnitudes of the forces will be equal.
Explanation:
Proton contain positive charge $=1.6 \times 10^{-19}= e$
Electron contain negative charge $=-1.6 \times 10^{-19}=- e$
Force inoniforma electric field is $=q E$
$\therefore$ The Magniludes of Electric force is equal But direction of electric force is opposite to each other.
mass of proton $=1.67 \times 10^{-27} Kg$
mass of electron $=9.1 \times 10^{-31} Kg$
So that Magnitudes of their acceleration will be unequal.

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