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Five balls numbered 1,2,3,4,and 5 are su...

Five balls numbered 1,2,3,4,and 5 are suspended using separated threads. The balls (1,2),(2,4) and (4,1) show electrostatic attraction while balls (2,3) and (4,5) show repulsion. Therefore, ball 1 must be

A

positively charged

B

negatively charged

C

neutral

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
D
Let us consider that ball 1 has any type of charge, 1 and 2 must have different charges, 2 and 4 must have different charegs i.e. 1 and 4 must have charges but electrostaitc attraction is also present in (1, 4) which is impossible.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTROSTATICS-PRACTICE EXERCISE (Exercise 2 (MISCELLANEOUS PROBLEMS))
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  2. Two charges placed in air repel each other by a force of 10^(-4)N. Whe...

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  3. Five balls numbered 1,2,3,4,and 5 are suspended using separated thread...

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  4. The angle between the dipole moment and electric field at any point on...

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  5. The electric field at point (30, 30, 0) due to a charge 0.008muC at or...

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  6. The electric field strength due to a circular loop of charge of radius...

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  7. A 400 pF capacitor, charged by a 100 volt d.c supply is disconnected ...

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  8. In the given circuit, charge Q(2) on the 2muF capacitor changes as C i...

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  9. Two capacitors of capacitance C are connected in series. If one of the...

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  10. Two positive point charges of 12 and 5 microcoulombs, are placed 10 cm...

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  11. In the arrangement of capacitors shown in the figure, each capacitor i...

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  12. The enrgy of a charged capacitor is U. Another identical capacitor is ...

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  13. Two identical parallel plate capacitors are placed in series and conne...

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  14. How many 6muF, 200V condensers are needed to make a condenser of 18muF...

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  15. Four plates of equal area A are separated by equal distance d and are ...

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  16. A 2muF capacitor is charged as shown in the figure. The percentage of ...

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  17. The capacitance of an isolated conducting sphere of radius R is propor...

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  18. Three capacitors 3muF, 6muF and 6muF are connected in series to a sou...

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  19. C,V,U and Q are capacitance, potential difference, energy stored and c...

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  20. If dielectric is inserted in charged capacitor ( battery removed ), t...

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