DigE Ch04 Basic Instruments and Measurements

Front

What type of scale does an ohmmeter utilize?

Back

Nonlinear scale.

Front

What is the resistance of a meter movement coil that achieves full-scale deflection with 0.001 A?

Back

50 ohms.

Front

What instrument is used to measure the volume of electrons flowing through a circuit?

Back

Ammeter.

Front

True or False: An ammeter can be damaged if connected directly across the source voltage.

Back

True.

Front

What is the total applied voltage to achieve full-scale deflection for a meter movement coil with 50 ohms resistance and 0.001 A?

Back

0.05 V.

Front

What is the purpose of a voltmeter?

Back

To measure the voltage across two points in a circuit.

Front

What happens if an ammeter is connected in parallel instead of in series?

Back

It can be damaged due to excessive current.

Front

Define 'ohmmeter'.

Back

An instrument used to measure electrical resistance.

Front

What is the function of a wattmeter?

Back

To measure the power in watts in an electrical circuit.

Front

How can a meter movement coil double its range as a voltmeter?

Back

By adding a 50 ohm resistor in series with the coil.