Practice # 3 Electrical Measuring Instruments

Front

The function of the ohmmeter is to measure ____________.

Back

Resistance

Front

Meter damping may be accomplished by: ____________.

Back

Both electrical and mechanical means

Front

Air damping is a common method of damping by ________ means.

Back

Mechanical

Front

When voltmeters are used, they are connected to a circuit in ____________.

Back

Parallel

Front

The current sensitivity of a meter movement is the amount of current required to drive the meter movement to a ____________.

Back

Full-scale deflection

Front

What is the primary purpose of an ammeter?

Back

To measure current in a circuit.

Front

Define 'electromotive force' (EMF).

Back

The energy provided per charge by a source of electrical energy.

Front

What is the difference between series and parallel connections in circuits?

Back

In series, components are connected end-to-end; in parallel, components are connected across the same voltage source.

Front

What does a voltmeter measure?

Back

Voltage or potential difference between two points.

Front

What is the principle of operation of a galvanometer?

Back

It measures current by detecting the magnetic field produced by the current.