Question: 1 5 0 0 r . p . m . The effective diameter of the moving disc of an electrostatic voltmeter is 1 5 cm

1500 r.p.m.
The effective diameter of the moving disc of an electrostatic voltmeter is 15 cm with an electrode separation of 1.5 cm . Find the weight in grams that is necessary to be added to balance the moving plate when measuring a voltage of 50 kV dc Derive the formula used. What is the force of attraction between the two plates when they are balanced?
1 5 0 0 r . p . m . The effective diameter of the

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