In electrostatic voltmeters, the principle of their operation is the force of attraction between electric charges on neighboring plates between which potential difference is maintained. The attracted – disc type electrostatic instruments are used for the measurement of ..............

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 In electrostatic voltmeters, the principle of their operation is the force of attraction between electric charges on neighboring plates between which potential difference is maintained. The attracted – disc type electrostatic instruments are used for the measurement of ..............