A voltmeter consists of a 25 ft coil connected in series with a 575 ft resistor. The coil takes 10 mA for full scale deflection. What maximum potential difference can be measured on this voltmeter?

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12V

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18V

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Solution

The correct option is A
6V

Full deflection current = 10 mA = (10 x 10^-3)A

R_eff= (575 + 25) = 600

V = R_effi = 600 x 10 x 10^-3= 6 V

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A voltmeter consists of a 25 ft coil connected in series with a 575 ft resistor. The coil takes 10 mA for full scale deflection. What maximum potential difference can be measured on this voltmeter?

The correct option is A 6VFull deflection current = 10 mA = (10 x 10-3)A Reff= (575 + 25) = 600 V = Reff i = 600 x 10 x 10-3= 6 V

The correct option is A
6V

Full deflection current = 10 mA = (10 x 10^-3)A

R_eff= (575 + 25) = 600

V = R_effi = 600 x 10 x 10^-3= 6 V