Advertisements
Advertisements
प्रश्न
A semiconductor device is connected in series with a battery, an ammeter and a resistor. A current flows in the circuit. If. the polarity of the battery is reversed, the current in the circuit almost becomes zero. The device is a/an ______.
विकल्प
intrinsic semiconductor
p-type semiconductor
n-type semiconductor
p-n junction diode
Advertisements
उत्तर
A semiconductor device is connected in series with a battery, an ammeter and a resistor. A current flows in the circuit. If. the polarity of the battery is reversed, the current in the circuit almost becomes zero. The device is a/an p-n junction diode.
Explanation:
When the battery's polarity is reversed, the p-n junction becomes reverse bias. As a result, its resistance rises and the current through the junction falls to nearly zero.
APPEARS IN
संबंधित प्रश्न
Explain the working of P-N junction diode in forward and reverse biased mode.
What happens when a forward bias is applied to a p-n junction?
Draw its I – V characteristics of photodiode
In the following diagram, is the junction diode forward biased or reverse biased ?
In a photo diode, the conductive increases when the material is exposed to light. It is found that the conductivity changes only if the wavelength is less than 620 nm. What is the band gap?
(Use Planck constant h = 4.14 × 10-15 eV-s, Boltzmann constant k = 8·62 × 10-5 eV/K.)
A plate current of 10 mA is obtained when 60 volts are applied across a diode tube. Assuming the Langmuir-Child relation \[i_p \infty V_p^{3/2}\] to hold, find the dynamic resistance rp in this operating condition.
The plate current in a diode is 20 mA when the plate voltage is 50 V or 60 V. What will be the current if the plate voltage is 70 V?
Basic materials used in the present solid state electronic devices like diode, transistor, ICs, etc are ______.
 (a) |
 (b) |
- Name the type of a diode whose characteristics are shown in figure (A) and figure (B).
- What does the point P in figure (A) represent?
- What does the points P and Q in figure (B) represent?
Draw a labelled characteristic curve (l-V graph) for a semiconductor diode during forward bias.
