The relation between and parameters of current gains for a transi… - Vidyadip

MCQ

The relation between $\alpha$ and $\beta$ parameters of current gains for a transistors is given by

A
$\alpha = \frac{\beta }{{1 - \beta }}$
✓
$\alpha = \frac{\beta }{{1 + \beta }}$
C
$\alpha = \frac{{1 - \beta }}{\beta }$
D
$\alpha = \frac{{1 + \beta }}{\beta }$

✓

Answer

Correct option: B.

$\alpha = \frac{\beta }{{1 + \beta }}$

b
(b)${i_e} = {i_b} + {i_c}$$ \Rightarrow \frac{{{i_e}}}{{{i_c}}} = \frac{{{i_b}}}{{{i_c}}} + 1$$ \Rightarrow \frac{1}{\alpha } = \frac{1}{\beta } + 1$$ \Rightarrow \alpha = \frac{\beta }{{(1 + \beta )}}$.

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

Explore more

More "M.C.Q (1 Marks)" from 14. Semicondutor electronics→14. Semicondutor electronics — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

A microscope is focussed on a coin lying at the bottom of a beaker. The microscope is now raised by $1 \,cm$. To what depth should water be poured into the beaker so that the coin is again in focus is ........ $cm$ (The refractive index of water is $\frac{4}{3}$ )

If mean wavelength of light radiated by $100 W$ lamp is $5000 Å$, then number of photons radiated per second are

Electrons moving with different speeds enter a uniform magnetic field in a direction perpendicular to the field. They will move along circular paths.

What is the value of capacitance of a capacitor if it has a charge of $9C$ and voltage of $5V?$

The carrier frequency generated by a tank circuit containing 1 nF capacitor and 10 mH inductor is

A resistor of resistance $R$ is connected to an ideal battery. If the value of $R$ is decreased, the power dissipated in the resistor will:

A parallel plate capacitor with plates of area $1\,m^2$ each, are at a separation of $0.1\,m.$ If the electric field between the plates is $100\,N/C,$ the magnitude of charge on each plate

Consider the combination of resistors as shown in figure and pick out the correct statement

A conducting wire bent in the form of a parabola $y^2 = 2x$ carries a current $i = 2 A$ as shown in figure. This wire is placed in a uniform magnetic field $\vec B = - 4\,\hat k$ $Tesla$. The magnetic force on the wire is (in newton)

A molecule with a dipole moment p is placed in an electric field of strength E. Initially the dipole is aligned parallel to the field. If the dipole is to be rotated to be anti-parallel to the field, the work required to be done by an external agency is