AIEEE 2008 | Semiconductor Question 223 | Physics

A working transistor with its three legs marked $$P,Q$$ and $$R$$ is tested using a multi-meter. No conduction is found between $$P$$ and $$Q$$. By connecting the common (negative) terminal of the multi-meter to $$R$$ and the other (positive) terminal to $$P$$ or $$Q,$$ some resistance is seen on the multi-meter. Which of the following is true for the transistor?

It is an $$npn$$ transistor with $$R$$ as base

It is an $$pnp$$ transistor with $$R$$ as collector

It is an $$pnp$$ transistor with $$R$$ as emitter

It is an $$npn$$ transistor with $$R$$ as collector

AIEEE 2007

MCQ (Single Correct Answer)

-1

If in a $$p$$-$$n$$ junction diode, a square input signal of $$10$$ $$V$$ is applied as shown AIEEE 2007 Physics - Semiconductor Question 218 English

Then the output signal across $${R_L}$$ will be

AIEEE 2007 Physics - Semiconductor Question 218 English Option 1

AIEEE 2007 Physics - Semiconductor Question 218 English Option 2

AIEEE 2007

MCQ (Single Correct Answer)

-1

Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?

The number of free electrons for conduction is significant only in $$Si$$ and $$Ge$$ but small in $$C.$$

The number of free conduction electrons is significant in $$C$$ but small in $$Si$$ and $$Ge.$$

The number of free conduction electrons is negligibly small in all the three.

The number of free electrons for conduction is significant in all the three

AIEEE 2006

MCQ (Single Correct Answer)

-1

If the lattice constant of this semiconductor is decreased, then which of the following is correct? AIEEE 2006 Physics - Semiconductor Question 219 English