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A particle having mass m and charge q is...

A particle having mass m and charge q is , rest. On applying a uniform electric field E it, it starts moving. What is its kinetic energ when it travels a distance y in the direction force ?

A

`qE^(2)y`

B

`q Ey^(2)`

C

qEy

D

`q^(2)Ey`

Text Solution

Verified by Experts

According to work energy theorem
`DeltaK = W`
`:. K - K_(0)= "Force" xx ` displacement
`:. K -0 = F xxy " " [ because K_(0)=0]`
`:. K = Eqy" " [ because F= Eq]`
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KUMAR PRAKASHAN-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Section D ( Multiple Choice Questions (MCQs) )
  1. Which one of the following is not a unit of electric potential ?

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  2. Give dimensional formula of electric potential.

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  3. A particle having mass m and charge q is , rest. On applying a uniform...

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  4. For a uniform electric field vecE = E(0)(hati), if the electric potent...

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  5. The work done by the charge Q through displacement Delta vecr = a hati...

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  6. What is the diameter of sphere of 4V potential kept near the points si...

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  7. Two spheres or different radii are given equal amount of charge. The ...

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  8. Charges on two spherical shells of radius r(1) and r(2) are same, then...

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  9. Two metallic sphenrs of radil R(1) and R(2) are charged. Now they are ...

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  10. Electric field on surfaces of two spheres of radius r(1) and r(2) are...

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  11. Surface churgc densities on the spheres of radius r(1) and r(2) are s...

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  12. Potenlials of points P and Q are 10V and -4 V respectively. Work done...

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  13. A point P al a certain distance from charge Q has electric potential 6...

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  14. The spheres of radius r and R having charge q and Q respectively on th...

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  15. The spherical shell has radius r. The potential difference V is betwee...

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  16. The radius of a charged hollow sphere is 10 cm. If V is the potential ...

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  17. Electrostatic potential is ...... physical quantity.

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  18. Kinetic energy of a charged particle decreases by 100 J when it is bro...

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  19. Electric potential at 5 can distance from centre of shell of 14 cm rad...

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  20. A particle having mass 1 g and electric charge 10^(-8) C travels from...

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