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The work done in moving an electron of c...

The work done in moving an electron of charge 'e' and mass m from A to B along the circular path shown by arrow in figure in the vertical plane in the field of charge Q is

A

2mgr

B

`(2Qe)/(r )`

C

`2mgr +(2Qe)/(r )`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
A
`W=m g h +q_(Delta) V`
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NARAYNA-ELECTROSTATIC POTENTIAL AND CAPACITANCE-EXERCISE -2 (H.W)
  1. Equal charges q are placed at the three corners B, C, D of a square A...

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  2. An electron having charge e located at A, in the presence of a point c...

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  3. The work done in moving an electron of charge 'e' and mass m from A to...

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  4. Four charges 10^(-8), -2 xx 10^(8), +3xx10^(-8) and 2xx10^(-8) coulom...

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  5. An electric charge 10^-3muC is placed at the origin (0, 0) of X-Y co-o...

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  6. An electron travelling from infinity with velocity v into an electric ...

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  7. Two points P and Q are maintained at the potentials of 10V and -4V, re...

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  8. A charge +q is placed at the origin O of x-y axes as shown in the figu...

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  9. Some equipotential surfaces are shown in figure. The electric field st...

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  10. A field of 100 V m^(-1) is directed at 30^(@) to positive x-axis. Find...

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  11. A uniform electric field of magnitude 5xx10^(3)N//C is directed along...

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  12. Find the V(ab) in an electric field E=(2hati+3hatj+4hatk)N/C, where ra...

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  13. A charge -2muC at the origin, -1muC at +7cm and 1muC at -7cm are place...

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  14. Four equal charges Q are placed at the four corners of a square of eac...

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  15. 2q and 3q are two charges separated by a distance 12 cm on x-axis. A t...

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  16. A particle of mass an charge q is projected vertically upwards .A unif...

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  17. A positive charge 'Q' is fixed at a point A negatively charged particl...

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  18. 10 C & -10C are placed at y = 1 & y = -1 m on y - axis. 1C charge is p...

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  19. Four particles, each of mass m and charge q, are held at the vertices ...

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  20. A particle of mass 2 g and charge 1 muC is held at rest on a frictionl...

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