Three equal weights \( A, B \) and \( C \) of mass \( 2 \mathrm{~kg} \) each are hanging on a st...

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Three equal weights \( A, B \) and \( C \) of mass \( 2 \mathrm{~kg} \) each are hanging on a string passing over a fixed frictionless pulley as shown in the figure The tension in the string connecting weights \( B \) and \( C \) is
[MP PET 1985; SCRA 1996]
(a) Zero
(b) \( 13 \mathrm{~N} \)
(c) \( 3.3 \mathrm{~N} \)
(d) \( 19.6 \mathrm{~N} \)
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