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b. A cylindrical disc has 0.8 cm diameter and 1 cm thickness. A cylindrical
cavity is made at the centre has 0.2 cm diameter and 0.2 cm thickness.
The discharge measured across the specimen is 0.4 c with sensitivity of 1
RC/volt. Given relative permittivity of the disc is 3, Evaluate the
magnitude of charge transferred from the cavity.

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