Two point charges of mass m each are suspended in the gravitational field of the Earth by two non-conducting massless strings, each of length 1, attached to the same fixed point. The spheres are given equal charges Q of the same sign. As a result each string makes angle a to the vertical (see figure below). Calculate m, if 1 = 78.3 cm, Q = 4 µC and a = π/6. Take Coulomb constant ke-8.99×109 Nm² C-2. Give your answer in grams. / / / / L d M

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Chapter26: Electric Potential
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Two point charges of mass m each are suspended in the gravitational field of the Earth by two non-conducting massless strings, each of length 1, attached
to the same fixed point. The spheres are given equal charges Q of the same sign. As a result each string makes angle a to the vertical (see figure below).
Calculate m, if 1 = 78.3 cm, Q = 4 µC and a = π/6. Take Coulomb constant ke-8.99×109 Nm² C-2. Give your answer in grams.
/
/ / / L
d
M
Transcribed Image Text:Two point charges of mass m each are suspended in the gravitational field of the Earth by two non-conducting massless strings, each of length 1, attached to the same fixed point. The spheres are given equal charges Q of the same sign. As a result each string makes angle a to the vertical (see figure below). Calculate m, if 1 = 78.3 cm, Q = 4 µC and a = π/6. Take Coulomb constant ke-8.99×109 Nm² C-2. Give your answer in grams. / / / / L d M
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