QuestenaPráctica que te muestra qué repasar después
Pregunta 180

What is the significance of voltmeter sensitivity expressed in ohms per volt?

  1. The full scale reading of the voltmeter multiplied by its ohms per volt rating is the input impedance of the voltmeterRespuesta correcta
  2. The reading in volts multiplied by the ohms per volt rating will determine the power drawn by the device under test
  3. The reading in ohms divided by the ohms per volt rating will determine the voltage applied to the circuit
  4. The full scale reading in amps divided by ohms per volt rating will determine the size of shunt needed

Explicación

Ohms per volt is a property of the meter movement, equal to the reciprocal of its full-scale current. Multiplying that rating by the full-scale voltage of the range in use gives the meter's input resistance on that range, which is what determines how heavily the meter loads the circuit.

Continúa con este test

Empezar la práctica
Pregunta 180: What is the significance of voltmeter sensitivity expressed… · FCC Amateur Extra Class (Element 4) · Questena