Question
Name two semiconductor materials.

Answer

Germanium, silicon.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Two coils one of larger radius $R$ and other of smaller radius $r$ are kept near. If mutual induction coefficient for this pair is $1 mH$ what is the magnetic flux associated with the larger coil when a current of $0.5 A$ is flowing in the smaller coil? When current in smaller coil is zero then what is its effect on larger coil?
Define the dielectric constant of a medium.
A charged particle enters a uniform magnetic field and parallel to its direction. What is the path of the particle?
In the circuit shown in Fig., find the value of $R_C$.
Figure shows a small diffused plane source S placed over a horizontal table-top at a distance of 2.4m with its plane parallel to the table-top. The illuminance at the point A directly below the source is 25 lux. Find the illuminance at a point B of the table at a distance of 1.8m from A.
 
Answer the following question:
When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. Explain why?
Write names of those radiations of electromagnetic radiations which are :(i) used in satellite communication (ii) used to study crystal structure (iii) produced as a result of decay of radioactive nucleus (iv) wavelength in between 350 nm and 770 nm (v) absorbed by the ozone layer (vi) produce extensive heating effect.
Define the term “threshold frequency”, in the context of photoelectric emission.
A resistor R is joined across a cell of internal resistance r and electromotive force E. Now a potentiometer measures potential difference V across the ends of the cell. Write an expression for r in terms of E, V and R.
Name the junction diode whose I-V characteristics are drawn below: