For #4-8 look at the picture below: In this sample question, the positive charge

Question

For #4-8 look at the picture below: In this sample question, the positive charge was released at location A and moved to location B. E field is downward. Location B is located at distance d below Location A. The Kinetic Energy change is opposite to the Potential Energy change, when there is no work done by external force. True or False? In this sample question, the positive charge was released at location A and moved to location B. E field is downward. Location B is located at distance d below Location A. The electric potential change delta V is positive. True or False? In this sample question, the positive charge was released at location A and moved to location B. E field is downward. Location B is located at distance d below Location A. The electric potential energy decreased by qEd. True or False? In this sample question, the positive charge was released at location A and moved to location B. E field is downward. Location B is located at distance d below Location A. If the E field was weaker, the charge would have reached a lower speed at B. True or False? In this sample question, the positive charge was released at location A and moved to location B. E field is downward. Location B is located at distance d below Location A. The textbook has a type at the end of page 751, when the value and Unit of the E field was plugged in. It should be 8.0 times 10^4 V/m. not 8.0 times 10^4V. True or False?

Explanation / Answer

True

The particle is moving under a constant electric field then the particle moves from positively charged plate to negatively charged plate. Now the particle gain kaintic energy as it is attracted by it. This gain in KE must be from the loss in PE as there are no other external forces acting on it.

So Change in KE = -Change in PE

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