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The work done in slowly moving an electr...

The work done in slowly moving an electron of charge e and mass m from A to B along semicircular path (as shown in the figure ) in vertical plane in the field of charge Q is .

A

`- 2` mgr

B

`- ("Qe")/(r )`

C

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

D

zero

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The correct Answer is:
A
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AAKASH INSTITUTE ENGLISH-ELECTROSTATIC POTENTIAL AND CAPACITANCE -EXERCISE
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  6. Two point charges of + 1.0 mu C are kept stationary 2m apart. How muc...

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  11. In given circuit, ratio of charge on 2 muF capacitor to the charge of ...

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  12. In the given circuit the charge on the plates of 1 muF capacitor, when...

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  15. In the given circuit, the electric potential of P will be

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  16. Two conducting spheres, each given a charge q are kept far apart as sh...

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  17. An uncharged capacitor is fully charged with a battery . The ratio of ...

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  18. Three capacitors are connected as shown in the figure . The potential ...

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  19. In the given network of capacitors, the equivalent capactiance between...

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  20. A capacitor of capacitance 6 muF is connected with an emf sourface 3 V...

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