When measuring AC (Alternating Current) with a multimeter, it is important to maintain the proper polarity.

What is the name of the device used to convert alternating current into direct current ?

A

Ammeter

B

Galvanometer

C

Rectifier

D

Transformer

The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces

A

The more heat than produced by A.C. when flowing through the same circuit

B

The same heat as produced by A.C. when flowing through the same circuit

C

The less heat than produced by A.flowing through the same circuit

D

None of the above

A multimeter measures

A

Current

B

Voltage

C

Resistance

D

Current, voltage, and resistance

The sensitivity of a multimeter is given in ___________.

A

$$\Omega $$

B

Amperes

C

$$\frac{{{\text{k}}\Omega }}{{\text{V}}}$$

D

None of the above

A VTVM has ___________ input resistance than that of a multimeter

A

More

B

Less

C

Same

D

None of the above

একটি AC (Alternating current) প্রবাহের সমীকরণ 1=50 sin (628t) হলে প্রবাহের কম্পাংক কত ?

A

1 H z

B

50 Hz

C

100 Hz

D

150 Hz

In the case of an unsymmetrical alternating current the average value must always be taken over

A

Unsymmetrical part of the wave form

B

The quarter cycle

C

The half cycle

D

The whole cycle

When an alternating current passes through an ohmic resistance the electrical power converted into heat is

A

Apparent power

B

True power

C

Reactive power

D

None of the above

The frequency of an alternating current is

A

The speed with which the alternator runs

B

The number of cycles generated in one minute

C

The number of waves passing through a point in one second

D

The number of electrons passing through a point in one second

A cable carrying alternating current has

A

Hysteresis losses only

B

Hysteresis and leakage losses only

C

Hysteresis, leakage and copper losses only

D

Hysteresis, leakage, copper and friction losses

When measuring AC (Alternating Current) with a multimeter, it is important to maintain the proper polarity.

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