In the figure- a proton moves a distance d in a uniform electric field E- as shown in the figure- Does the electric field do a positive or negative work on the proton- Does the electric potential energy of the proton increases or decreases-E-1-1-

The correct option is B ve, increaseW = F.d Proton is moving against the direction of electric field, So W = F d cos 180^∘, W = Ve Proton is moving in elect ...

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Standard XII

Physics

Potential Energy - External Viewpoint

In the figure...

Question

In the figure, a proton moves a distance d in a uniform electric field $\to E$ as shown in the figure. Does the electric field do positive or negative work on the proton? Does the electric potential energy of the proton increases or decrease:

-ve, increase

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+ve, decrease

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–ve, decrease

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+ve, increase

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Solution

The correct option is (B) -ve, increase
Work done in the electric field is given as $W = F . d$
Proton is moving against the direction of the electric field, So $W = F d c o s 180^{\circ}, W = - V e$
Proton is moving in the electric field from low potential region to high potential region, so its potential energy increases.

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In the figure, a proton moves a distance d in a uniform electric field →E as shown in the figure. Does the electric field do positive or negative work on the proton? Does the electric potential energy of the proton increases or decrease:

In the figure, a proton moves a distance d in a uniform electric field $\to E$ as shown in the figure. Does the electric field do positive or negative work on the proton? Does the electric potential energy of the proton increases or decrease: