Two small spherical balls each carrying a charge Q = 10 µC (10 micro-coulomb) are suspended by two insulating threads of equal lengths 1 m each, from a point fixed in the ceiling. If is found that is equilibrium threads are separated by an angle 60º between them, as shown in the fig. What is the tension in the threads (Given 
= 9 × 10 9 Nm/C 2 ) –
Text Solution
Verified by ExpertsThe correct answer is:
B
T sin 30 = 9.0 × 10 9 × 100×10 –12
T = 2 × 9.0 × 10 –1 = 18 × 10 –1 = 18 × 10 –1 = 1.8 N
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