WorksheetsZener Diode
Total questions: 10
Worksheet time: 5mins
What is the primary function of a Zener diode in biomedical electronic devices?
Amplify signals
Rectify AC to DC
Maintain a stable reference voltage
Generate high-frequency pulses
In a biomedical sensor circuit, a Zener diode is often used to:
Filter noise from ECG signals
Protect sensitive components from voltage spikes
Convert analog signals to digital
Measure body temperature
In an ECG monitoring device, the Zener diode helps to:
Amplify the ECG signal
Regulate the power supply voltage to the instrumentation amplifier
Generate the QRS complex
Measure the heart rate directly
Which of the following is a typical Zener voltage used in low-power biomedical circuits?
1 V
5–12 V
50 V
100 V
In a biosensor-based glucose monitor, Zener diodes are used to:
Prevent overvoltage to the sensitive enzymatic sensor
Increase sensitivity of glucose detection
Filter out high-frequency noise
Store calibration data
Which of the following circuits in biomedical electronics typically incorporates Zener diodes?
ECG front-end amplifier power supply
Pulse oximeter LED driver
Digital thermometer microcontroller
All of the above
How does a Zener diode protect a biomedical device during power supply fluctuations?
By short-circuiting all current
By clamping voltage to a safe level
By converting AC to DC
By storing energy
A Zener diode in reverse bias with a breakdown voltage of 10 V is used in a biomedical circuit. If the supply voltage rises to 12 V, what happens?
Device operates normally
Zener diode maintains voltage around 10 V to protect the circuit
Zener diode stops conduction completely
Circuit will fail
In implantable biomedical devices, why are Zener diodes preferred for voltage regulation?
They consume very high power
They provide fast and precise voltage stabilization
They generate biological signals
They convert glucose to electricity
Which of the following is a correct statement regarding Zener diodes in biomedical applications?
They are only used for high-voltage applications
They provide current amplification for sensors
They provide voltage reference and overvoltage protection
They are used as the primary signal generator in biosensors
