Question
Give brief explanation of a semi-conductor diode.
✓
Answer
→A semiconductor diode is basically a $p-n$ junction with metallic contacts provided at the ends for the application of an external voltage. It is a two terminal device. A $p-n$ junction diode is symbolically represented as shown in fig. (b).
→The direction of arrow indicates the conventional direction of current (When the diode is under forward bias.) The equilibrium barrier potential can be altered by an external voltage V across the diode.
→The situation of $p-n$ junction diode under equilibrium (without bias) is shown in fig. (a) and (b).
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
More "3 Marks Question" from SEMICONDUCTOR ELECTRONICS: MATERIALS, DEVICES AND SIMPLE CIRCUITS→SEMICONDUCTOR ELECTRONICS: MATERIALS, DEVICES AND SIMPLE CIRCUITS — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→
Similar questions
- Draw a schematic diagram of a reflecting telescope.
- State the advantages of reflecting telescope over refracting telescope.
A uniform magnetic field of magnitude 0.20T exists in space from east to west. With what speed should a particle of mass 0.010g and with charge 1.0 × 10-5C be projected from south to north so that it moves with uniform velocity?
The instantaneous current in an ac circuit is $\text{i}=0.5\sin314\text{t},$ what is (i) rms value and (ii) frequency of the current.
→A convex lens of focal length 20 cm is placed coaxially with a convex mirror of radius of curvature 20 cm. The two are kept at 15 cm from each other. A point object lies 60 cm in front of the convex lens. Draw a ray diagram to show the formation of the image by the combination. Determine the nature and position of the image formed.
Is it easier to take out a nucleon from carbon or from iron? Fi-om iron or from lead?
A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is 1.5 × 103 N/C and points radially inward, what is the net charge on the sphere?
A convex lens produces a double size real image when an object is placed at a distance of 18cm from it. Where should the object be placed to produce a triple size real image?
Two harmonic waves of monochromatic light
→$\text{y}_{1} = \text{a} \cos\omega\text{t}\text{ and } \text{y}_{2} = \text{a} \cos(\omega\text{t} + \Phi)$
are superimposed on each other. Show that maximum intensity in interference pattern is four times the intensity due to each slit. Hence write the conditions for constructive and destructive interference in terms of the phase angle$\Phi$.
A rectangular wire loop of width a is suspended from the insulated pan of a spring balance, as shown in A current i exists in the anti-clockwise direction in the loop. A magnetic field Bexists in the lower region. Find the change in the tension of the spring if the current in the loop is reversed.
A metallic rod of $1 m$ length is rotated with a frequency of $50 rev / s$, with one end hinged at the centre and the other end at the circumference of a circular metallic ring of radius $1 m$, about an axis passing through the centre and perpendicular to the plane of the ring (Fig. 6.11). A constant and uniform magnetic field of $1 T$ parallel to the axis is present everywhere. What is the emf between the centre and the metallic ring?
→