JEE PHYSICS UNIT 19
QUIZ NO 3
TOTAL QUESTIONS = 20
1. The forward bias of a diode results in
A. Increase in width of the depletion region
B. Decrease in width of the depletion region
C. Increase in resistance
D. Decrease in current flow
2. In an LED, light is emitted due to
A. Recombination of electron-hole pairs
B. Absorption of light energy
C. Reflection of light
D. Voltage drop across the diode
3. In a P-N junction, when it is forward biased, the current mainly depends on
A. Thermal voltage
B. Applied voltage
C. Depletion width
D. Carrier concentration
4. Which of the following is true about a diode in reverse bias?
A. It conducts a small reverse saturation current
B. It conducts large current
C. It behaves like an open circuit
D. It behaves like a short circuit
5. The depletion region of a P-N junction in reverse bias
A. Widens
B. Shrinks
C. Does not change
D. Becomes neutral
6. A transistor in common-emitter configuration has
A. Voltage gain but no current gain
B. Current gain but no voltage gain
C. Both voltage and current gain
D. No voltage or current gain
7. The characteristic of a Zener diode is that it operates in the
A. Forward bias only
B. Reverse breakdown region
C. Reverse bias without breakdown
D. Forward breakdown region
8. Which of the following devices is used for voltage regulation?
A. Zener diode
B. LED
C. Solar cell
D. Rectifier
9. In a photodiode, current flows due to
A. Light exposure
B. Forward bias
C. Reverse bias
D. External voltage
10. Which of the following is a property of a P-N junction diode?
A. It allows current in both directions
B. It allows current in one direction
C. It does not conduct at all
D. It conducts in reverse bias only
11. In a transistor, the emitter current is the sum of
A. Base current and collector current
B. Base current and leakage current
C. Collector current and leakage current
D. Collector current and base current
12. What is the primary use of a light-emitting diode (LED)?
A. For lighting purposes
B. For switching
C. For current amplification
D. For voltage regulation
13. Which of the following is the characteristic of a Zener diode?
A. It allows current only in the forward bias
B. It allows current in both directions
C. It allows current in reverse bias after a specific breakdown voltage
D. It does not allow current in any direction
14. In a transistor amplifier, the collector current is controlled by
A. Base current
B. Emitter current
C. Collector voltage
D. Base voltage
15. Which material is most commonly used for making diodes?
A. Silicon
B. Aluminum
C. Copper
D. Iron
16. Which of the following is used to increase the current in a transistor amplifier circuit?
A. Transistor
B. Resistor
C. Capacitor
D. Inductor
17. In a Zener diode, the breakdown voltage is
A. Temperature-dependent
B. Temperature-independent
C. Nonlinear
D. Zero
18. In a P-N junction, the current flows due to
A. Movement of charge carriers
B. Voltage applied across the junction
C. Temperature of the material
D. Electrical field applied externally
19. The function of the base in a transistor is to
A. Control the flow of current between emitter and collector
B. Increase the base current
C. Increase the collector current
D. Reduce the emitter current
20. Which of the following is true about a P-N junction diode in forward bias?
A. The current is determined by the thermal voltage
B. The current is controlled by the breakdown voltage
C. The current increases exponentially with applied voltage
D. The current remains constant irrespective of the voltage
Submit Quiz
Disclaimer for MCQ Quiz
The questions in this MCQ quiz are intended solely for educational purposes. While we strive to ensure the accuracy of the content, the information provided may not always be up-to-date or complete. The quiz creators are not liable for any misunderstandings, errors, or any consequences arising from the use of this quiz. Participants should verify any information independently before relying on it for any critical decision-making.
इस MCQ क्विज़ के प्रश्न केवल शैक्षिक उद्देश्यों के लिए हैं। हम सामग्री की सटीकता सुनिश्चित करने का प्रयास करते हैं, फिर भी यहां दी गई जानकारी हमेशा अद्यतित या पूर्ण नहीं हो सकती। क्विज़ के निर्माता किसी भी गलतफहमी, त्रुटि या इस क्विज़ के उपयोग से उत्पन्न होने वाले किसी भी परिणाम के लिए उत्तरदायी नहीं हैं। प्रतिभागियों को किसी भी महत्वपूर्ण निर्णय के लिए इस जानकारी पर निर्भर होने से पहले स्वतंत्र रूप से इसकी पुष्टि करनी चाहिए। https://www.pyqonline.com यदि कोई गलती है या कोई सुझाव है तो e-mail करें
[email protected]