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An electron at rest has a charge of 1.6 ...

An electron at rest has a charge of `1.6 × 10^(–19) C.` It starts moving with a velocity v = c/2, where c is the speed of light, then the new charge on it is -

A

`1.6 xx 10^(-19)` Coulomb

B

`1.6 xx 10^(-19) sqrt(1-((1)/(2))^(2))` Coulomb

C

`1.6 xx 10^(-19)sqrt(((1)/(2))^(2)-1)` Coulomb

D

`(1.6 xx 10^(-19))/(sqrt(1-((1)/(2))^(2)))` Coulomb

Text Solution

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The correct Answer is:
A
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MOTION-ELECTROSTATICS-Exercise -1 (Objective Problems | NEET)
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  10. The force between an alpha-particle and an electron separated by a dis...

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  11. Two similar and equal charges repel each other with force of 1.6 N. Wh...

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  13. Two point charges in air at a distance of 20 cm. from each other inter...

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  14. The permittivity in(0) of vacuum is 8.86 xx 10^(-12) C^(2)//N-m^(2) an...

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  15. The force between two point charges in vacuum is 15N, if a brass plate...

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  16. A particle of mass m and charge q is located midway between two fixed ...

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  17. ABC is a right angle triangle AB = 3 cm, BC = 4 cm charge +15, +12, -1...

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  18. Equal charges each of 20 muC are placed at x = 0, 2,4,8,16 cm on X-axi...

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  19. Three identical charges are placed at corners of a equilateral triange...

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  20. Five point charges, each of value +q coul, are placed on five vertices...

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