Electronic Design Quiz # 3

In a Wien-bridge oscillator with R=5KΩ and C=0.01µF, the frequency of oscillation will be _____.

7.8 KHz

3.2 KHz

2.5 KHz

780 Hz

An oscillator is a _____.

rotating device

static electronic device

rotating electronic device

electro-mechanical device

Negative Feedback in amplifiers increases _____.

bandwidth

input resistance

output resistance

both a and b

An operational amplifier can amplify ____________.

D.C signals only

A.C signals only

square waves

None of the above

For a class-A power amplifier, the position of point Q is _____.

in the cut-off region

just above the cut-off

at the center of load line

below the cut-off

If the RF signal is 600 KHz and the local oscillator frequency is 1000KHz, the output of the mixer will be _____.

400 KHz

600 KHz

1000 KHz

1600 KHz

In a half wave rectifier, the maximum firing angle is restricted to _____.

45°

60°

90°

180°

For a three phase full wave rectifier, no load D.C output is _____.

2 Vm/p

Vm/p

Vm/2p

3Vm/p

________ is an example of an electronic communication tool.

Microsoft Outlook

Google Docs

Apple FaceTime

MS SharePoint

Google Talk

A _____ is a permanent telephone connection between two points.

Dedicated line

Party line

Leased line

Local line

One advantage of communicating via e-mail is that it is __________.

Temporary and can be deleted

A permanent record

A secure and private communication

Electro___________ is a procedure that destroys tissue by burning with an electric spark.

Desiccation

Leukoplakia

Dermabrasion

Impetigo