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A very large, charged plate floats in de...

A very large, charged plate floats in deep space. Due to the charge on the plate, a constant electric field E exists everry above the plate. An object with mass m and charge q is shot upward from the plate with a velocity v and at an angle `theta`. It follows the path shown reaching a height h and a ramge R. Assume the effects of gravity to be negligible.

Suppose E is `10 N//C`, m is `1` kg, q is `-1C`, v is `100 m//s` and `theta` is `30^(@)`. What is h?

A

25 m

B

45 m

C

80 m

D

125 m

Text Solution

Verified by Experts

The correct Answer is:
D
`h=(u^(2) sin^(2) theta)/(2a)=(100xx100xx(1/2)^(2))/(2xx(1xx10)/1)=125 m`
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