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When a proton moves opposite to electric...

When a proton moves opposite to electric field, work done on it by electric field is ..... . and electrostatic potential energy of proton ......,

A

negative, increases

B

negative, decreases

C

positive, increases

D

positive, decreases

Text Solution

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The correct Answer is:
A, C
Work done by electric field W = `vecF.vecd`
`:. W lt 0 (because "Here" vecF ` and `vecd` are in opposite directions )
Here potential energy of proton will increase.
`( because ` its kinetic energy decreases )
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KUMAR PRAKASHAN-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Section D ( Multiple Choice Questions (MCQs) )
  1. When a unit positive charge moves from one point to another point in a...

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  2. Electric force on an electron, in an electric field is .......

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  3. When a proton moves opposite to electric field, work done on it by ele...

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  4. When a negative charge is moved from surface of Earth to a certain hei...

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  5. A moving electron approaches another electron. What would be the chang...

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  6. When a charged conductor is placed ln an external electric field, insi...

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  7. Electrostatic potential can be defined at any - point in the electric ...

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  8. Electrostatic potential at some point in the clecLric field means .......

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  9. At points P and Q, two identical charges each q are placed. When we mo...

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  10. Inside a uniformly charged spherical shell, electric field is ...... a...

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  11. Electrostatic potential at one point is V. Then electric field along X...

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  12. Surface of Earth is considered at ...... gravitational potential (in p...

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  13. Electric field is directed along the direction in which rate of electr...

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  14. A proton is moving away from an electron, then find the change in pote...

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  15. Unit of line integration of electric field is ......

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  16. The line integral or an electric field along the circumference of a ci...

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  17. 2C electric charge Is displaced from a point of electric potential -20...

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  18. The work done by carrying, unit positive charge in an electric field u...

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  19. Which one of the following is not a unit of electric potential ?

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  20. Give dimensional formula of electric potential.

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