Chapter 8: Electrical Measurements

Which instrument would you use to measure electric potential?

• An ammeter

• A voltmeter

• A wavemeter

• An ohmmeter

Which of the following precautions should be taken when measuring high voltages with a voltmeter?

• Ensure that the voltmeter has very low impedance

• Ensure that the voltmeter and leads are rated for use at the voltages to be measured

• Ensure that the circuit is grounded through the voltmeter

• Ensure that the voltmeter is set to the correct frequency

How is a voltmeter connected to a component to measure applied voltage?

• In series

• In parallel

• In quadrature

• In phase

Which instrument is used to measure electric current?

• An ohmmeter

• An electrometer

• A voltmeter

• An ammeter

Which of the following precautions should be taken when measuring in-circuit resistance with an ohmmeter?

• Ensure that the applied voltages are correct

• Ensure that the circuit is not powered

• Ensure that the circuit is grounded

• Ensure that the circuit is operating at the correct frequency

Which of the following measurements are made using a multimeter?

• Signal strength and noise

• Impedance and reactance

• Voltage and resistance

• All choices are correct

When configured to measure current, how is a multimeter connected to a component?

• In series

• In parallel

• In quadrature

• In phase

What reading indicates that an ohmmeter is connected across a large, discharged capacitor?

• Increasing resistance with time

• Decreasing resistance with time

• Steady full-scale reading

• Alternating between open and short circuit

Which is equal to one kilovolt?

• One one-thousandth of a volt

• One hundred volts

• One thousand volts

• One million volts

Which is equal to one microvolt?

• One one-millionth of a volt

• One million volts

• One thousand kilovolts

• One one-thousandth of a volt