मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

If the Two Ends of A P-n Junction Are Joined by a Wire, - Physics

Advertisements
Advertisements

प्रश्न

If the two ends of a p-n junction are joined by a wire,

पर्याय

  • there will not be a steady current in the circuit

  • there will be a steady current from the n-side to the p-side

  •  there will a steady current from the p-side to the n-side

  • there may or may not be a current depending upon the resistance of the connecting wire

MCQ

उत्तर

there will not be a steady current in the circuit    

In a p‒n junction, current flows only if it is connected to the battery. If two ends of a p‒njunction are joined by a wire, then there will be diffusion and drift currents in the circuit and they will cancel each other. Hence, no current will flow in the circuit.

shaalaa.com
p-n Junction
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 23: Semiconductors and Semiconductor Devices - MCQ [पृष्ठ ४१७]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
पाठ 23 Semiconductors and Semiconductor Devices
MCQ | Q 7 | पृष्ठ ४१७

संबंधित प्रश्‍न

Write the two processes that take place in the formation of a p-n junction.


A zener diode is fabricated by heavily doping both p- and n- sides of the junction. Explain, why?


Explain briefly with the help of necessary diagrams, the  reverse biasing of a p-n junction diode. Also draw characteristic curves.


Explain, with the help of a circuit diagram, the working of a photo-diode. Write briefly how it is used to detect the optical signals.


How is a zener diode fabricated so as to make it a special purpose diode? Draw I-V characteristics of zener diode and explain the significance of breakdown voltage.

Explain briefly, with the help of a circuit diagram, how a p-n junction diode works as a half wave rectifier.


When a p-type impurity is doped in a semiconductor, a large number of holes are created, This does not make the semiconductor charged. But when holes diffuse from the p-side to the n-side in a p-n junction, the n-side gets positively charged. Explain.


The drift current in a p-n junction is


A hole diffuses from the p-side to the n-side in a p-n junction. This means that


Calculate the current through the circuit and the potential difference across the diode shown in figure. The drift current for the diode is 20 µA.


Each of the resistance shown in figure has a value of 20 Ω. Find the equivalent resistance between A and B. Does it depend on whether the point A or B is at higher potential?


Find the currents through the resistance in the circuits shown in figure. 

(Assume that the resistance of each diode is zero in forward bias and is infinity in reverse bias.)


Find the current through the resistance R in figure if (a) R = 12Ω (b) R = 48Ω.

(Assume that the resistance of each diode is zero in forward bias and is infinity in reverse bias.)


Draw the current-voltage characteristics for the device show in figure between the terminals A and B.

(Assume that the resistance of each diode is zero in forward bias and is infinity in reverse bias.)


A load resistor of 2kΩ is connected in the collector branch of an amplifier circuit using a transistor in common-emitter mode. The current gain β = 50. The input resistance of the transistor is 0.50 kΩ. If the input current is changed by 50µA. (a) by what amount does the output voltage change, (b) by what amount does the input voltage change and (c) what is the power gain?


Choose the correct option.

Current through a reverse-biased p-n junction increases abruptly at:


If in a p-n junction diode, a square input signal of 10 V is applied as shown Then the output signal across RL will be ______

 


The depletion layer in the p-n junction diode is caused by ______.


Zener breakdown occurs in a p-n junction having p and n both:


During the formation of a p-n junction ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×