CABT Fundamentals of Electronics 3

Question 1

In a full-wave bridge rectifier, how many diodes are required?

Accepted Answer

4

Answer

1

Answer

2

Answer

6

Question 2

What is the primary advantage of using a switching power supply over a linear power supply in biomedical equipment?

Accepted Answer

Higher efficiency and smaller size

Answer

Lower output ripple

Answer

Better regulation at all loads

Answer

Lower electromagnetic interference

Question 3

A Wheatstone bridge is balanced when:

Accepted Answer

R1/R2 = R3/R4

Answer

R1 + R2 = R3 + R4

Answer

R1 × R2 = R3 × R4

Answer

R1 - R2 = R3 - R4

Question 4

In digital logic, what is the output of a NAND gate when both inputs are HIGH?

Accepted Answer

LOW

Answer

HIGH

Answer

Undefined

Answer

Depends on supply voltage

Question 5

What phenomenon occurs when an AC signal causes a transistor to conduct during only part of the input cycle in Class B amplification?

Accepted Answer

Crossover distortion

Answer

Harmonic distortion

Answer

Intermodulation distortion

Answer

Phase distortion

Question 6

A 12-bit ADC with a 5V reference voltage has a resolution of approximately:

Accepted Answer

1.22 mV

Answer

0.122 mV

Answer

12.2 mV

Answer

122 mV

Question 7

In a biomedical instrumentation amplifier, the primary purpose of the input stage with matched resistors is to:

Accepted Answer

Achieve very high CMRR and input impedance

Answer

Provide high voltage gain

Answer

Reduce output offset voltage

Answer

Filter high-frequency artifacts