NEET UG PHYSICS MCQ: SEMI CONDUCTOR DEVICES

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Analyzing +4 | -1

A working transistor with its three legs marked

P,Q

and

R

is tested using a multimeter. No conduction is found between

P

and

Q

. By connecting the common (negative) terminal of the multimeter to

R

and the other (positive) terminal to

P

Q

, some resistance is seen on the multimeter. Which of the following is true for the transistor?

View answer and explanation

Correct option: A

It is an

n - p - n

transistor with

R

as base

Option A (It is an

n - p - n

transistor with

R

as base) is correct because the multimeter shows conduction when the negative terminal is connected to R and the positive terminal to P or Q, indicating that R is the base of an NPN transistor.

More Questions from SEMI CONDUCTOR DEVICES

Practice All Chapter MCQs →

Following is the relation between current and charge

I = A{T^2}{e^{q/{V_L}}}

, then value of

{V_L}

will be To measure light intensity we use The ratio of RMS output voltage of full wave rectifier and half wave rectifier is

\sqrt{n}.

The value of

n

is? (The input voltage is sine wave). The truth table shown in figure is for
A    0   0   1   1
B    0   1   0   1
Y    1   0   0   1  The average value of output direct current in a half wave rectifier is A

p - n\;

junction has acceptor impurity concentration of

{10^{17}}\mathrm{c}{\mathrm{m}^{ - 3}}

in the

P

side and donor impurity concentration of

{10^{16}}

\mathrm{c}{\mathrm{m}^{ - 3}}

in the

N

side. What is the contact potential at the junction? (

kT =

thermal energy, intrinsic carrier concentration

{n_i} = 1.4 \times {10^{10}}

\mathrm{c}{\mathrm{m}^{ - 3}}

)