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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 ______.
पर्याय
intrinsic semiconductor
p-type semiconductor
n-type semiconductor
p-n junction diode
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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
(i) Explain with the help of a diagram the formation of depletion region and barrier potential in a pn junction.
What happens when a forward bias is applied to a p-n junction?
Plot a graph showing variation of current versus voltage for the material GaAs ?
The power delivered in the plate circular of a diode is 1.0 W when the plate voltage is 36 V. Find the power delivered if the plate voltage is increased to 49 V. Assume Langmuir-Child equation to hold.
Diffusion in a p-n junction is due to ______.
When an electric field is applied across a semiconductor ______.
- electrons move from lower energy level to higher energy level in the conduction band.
- electrons move from higher energy level to lower energy level in the conduction band.
- holes in the valence band move from higher energy level to lower energy level.
- holes in the valence band move from lower energy level to higher energy level.
 (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?
If each diode in figure has a forward bias resistance of 25 Ω and infinite resistance in reverse bias, what will be the values of the current I1, I2, I3 and I4?
Differentiate between the threshold voltage and the breakdown voltage for a diode.
Answer the following giving reasons:
A p-n junction diode is damaged by a strong current.
