AIPMT 2009 | Semiconductor Electronics Question 75 | Physics

AIPMT 2009

MCQ (Single Correct Answer)

-1

Out of Syllabus

A transistor is operated in common-emitter configuration at V_C = 2V such that a change in the base current from 100 $$\mu $$A to 200 $$\mu $$A produces a change in the collector current from 5 mA to 10 mA. The current gain is

100

150

AIPMT 2009

MCQ (Single Correct Answer)

-1

A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength

4000 nm

6000 nm

4000 $$\mathop A\limits^ \circ $$

6000 $$\mathop A\limits^ \circ $$

AIPMT 2009

MCQ (Single Correct Answer)

-1

Sodium has body centred packing. Distance between two nearest atoms is 3.7 $$\mathop A\limits^ \circ $$. The lattice parameter is

4.3 $$\mathop A\limits^ \circ $$

3.0 $$\mathop A\limits^ \circ $$

8.6 $$\mathop A\limits^ \circ $$

6.8 $$\mathop A\limits^ \circ $$

AIPMT 2008

MCQ (Single Correct Answer)

-1

A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly

1 $$ \times $$ 10¹⁴ Hz

20 $$ \times $$ 10¹⁴ Hz

10 $$ \times $$ 10¹⁴ Hz

5 $$ \times $$ 10¹⁴ Hz

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