An electron falls from rest through a vertical distance $$h$$ in a uniform and vertically upward-directed electric field $$E$$. The direction of the electric field is now reversed, keeping its magnitude the same. A proton is allowed to fall from rest through the same vertical distance $$h$$. The fall time of the electron in comparison to the fall time of the proton is:

 1 smaller 2 $$5$$ times greater 3 $$10$$ times greater 4 equal
Subtopic: Â Electric Field |
Â 61%
From NCERT
NEET - 2018
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A toy car with charge $$q$$ moves on a frictionless horizontal plane surface under the influence of a uniform electric field $$\vec E.$$Due to the force $$q\vec E,$$ its velocity increases from $$0$$ to $$6~\text{m/s}$$ in a one-second duration. At that instant, the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between $$0$$ to $$3$$ seconds are respectively:
1. $$2~\text{m/s}, ~4~\text{m/s}$$
2. $$1~\text{m/s}, ~3~\text{m/s}$$
3. $$1~\text{m/s}, ~3.5~\text{m/s}$$
4. $$1.5~\text{m/s},~ 3~\text{m/s}$$

Subtopic: Â Electric Field |
Â 63%
From NCERT
NEET - 2018
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
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