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Two small spheres each having equal posi...

Two small spheres each having equal positive charge Q(Coulomb) on each are suspended by two insulating strings of equal length L (meter) from a rigid hook (shown in Fig.). The whole set up is taken into satellite where there is no gravity. The two balls are now held by electrostatic forces in horizontal position, the tension in each string is then

A

`(Q^2)/(16 pi epsi_0 L^2)`

B

`(Q^2)/(8 pi epis_0 L^2)`

C

`(Q^2)/(4 pi epis_0 L^2)`

D

`(Q^2)/(2pi epsi_0 L^2)`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-APPENDICES ( REVISION EXERCISE )-REVISION EXERCISE (MAGNETISM AND MATTER )
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  9. Two north poles each of pole strength m and a south pole of pole stren...

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  10. The magnetic induction at a distance 'd' from the magnetic pole of unk...

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  11. The force between two short magnets is 'F'. When the pole strengths of...

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  12. The poles of a horse-shoe magnet cach of pole strength 2A-m are at 4cm...

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  13. Two poles of a horse shoe magnet each of pole strength 2 Am are 8 cm a...

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  14. The length of a magnet of moment 5A m^2 is 14cm. The magnetic inductio...

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  15. A magnet of length 10cm and magnetic moment 1 Am^2 is placed along the...

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  16. Two identical magnetic poles each of strength 'm' are placed at the ve...

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  17. The pole strength of a 12cm long bar magnet is 20Am. The magnetic indu...

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  18. Two short bar magnets of magnetic moments m each are arranged at the o...

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  19. The pole strength of a 12cm long bar magnet is 20Am. The magnetic indu...

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  20. Two short magnets each of moment M are placed one over the other at ri...

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  21. A short bar magnet of magnetic movement 5.25xx10^(-2)J T^(-1) is plac...

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