Electronic Design MCQs (Chapterwise Multiple Choice Questions)

In a class-B power amplifier, the output signal is obtained only _____.

for one half cycle period of the input A.C signal

for full cycle period of the input A.C signal

for quarter cycle period of the input A.C signal

Answer & Explanation

Correct Answer: for one half cycle period of the input A.C signal

Note: This Question is unanswered, help us to find answer for this one

One of the ways to destroy a diode is _____.

to exceed the current limit in forward direction

to apply a small voltage in the reverse direction

to dip it in water

to drop on the floor

Answer & Explanation

Correct Answer: to exceed the current limit in forward direction

Note: This Question is unanswered, help us to find answer for this one

The transformer is used for impedance matching . It is expected to match 1296Ω resistance on the primary side to a 16Ω resistance on the secondary side. Calculate the required turn ratio of a transformer, what is the type of transformer?

Step-up

Step-down

Cannot be determined

Answer & Explanation

Correct Answer: Step-down

Note: This Question is unanswered, help us to find answer for this one

In an amplifier , the coupling capacitors are employed for _____.

limiting the bandwidth

matching the impedances

controlling the output

preventing the D.C from mixing with the input or output

Answer & Explanation

Correct Answer: preventing the D.C from mixing with the input or output

Note: This Question is unanswered, help us to find answer for this one

The output impedance of an operational amplifier is _____.

very low

very high

dependant on the signal applied

None of the above

Answer & Explanation

Correct Answer: very low

Note: This Question is unanswered, help us to find answer for this one

The Hall Effect voltage in intrinsic silicon _____.

is positive

is zero

is negative

changes the sign on the application of the magnetic field

Answer & Explanation

Correct Answer: is negative

Note: This Question is unanswered, help us to find answer for this one

In the transistor circuit shown in the figure, the collector-to-ground voltage is 20V. Which of the following is the probable cause of the error?

The collector-emitter terminals short-circuited

The emitter to ground connection open

The 10KΩ resistor open

The collector- base terminal short-circuited

Answer & Explanation

Correct Answer: The emitter to ground connection open

Note: This Question is unanswered, help us to find answer for this one

Which of the following does not cause permanent damage to an SCR?

High current

High rate of the rise of the current

High temperature rise

High rate of the rise of the voltage

Answer & Explanation

Correct Answer: High current

Note: This Question is unanswered, help us to find answer for this one

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

Answer & Explanation

Correct Answer: 400 KHz

Note: This Question is unanswered, help us to find answer for this one

A voltage V=300cos100t is applied to a half wave rectifier with RL =5KΩ. The rectifier may be represented by an ideal diode in series with a resistance of 1KΩ. What would be the ripple factor in this case?

0

100%

110.21%

121.13%

Answer & Explanation

Correct Answer: 121.13%

Note: This Question is unanswered, help us to find answer for this one

Electronic Design Quick Quiz

Poor Results!

You need a lot of improvement.

Just don't give up!

Correct Answers: 0/10

Start Practicing with our MCQs given below.