2019 MHT-CET PCB SET - 01 - Maharashtra Board STD 12 Science MHT - CET Questions

200

Questions

1

Question groups

5

Question types

01

MCQ

200 Q→

Sample Questions

2019 MHT-CET PCB SET - 01 questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark

For a common emitter configuration, if 'α' and 'β' have their usual meanings, the correct relationship between 'α' and 'β' is ______.

✓
$\frac{1}{\alpha}=\frac{1}{\beta}+1$
B
$\alpha=\frac{\beta}{1-\beta}$
C
$\alpha=\frac{\beta^2}{1+\beta^2}$
D
$\alpha=\frac{1-\beta}{\beta}$

Answer: A.

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Q 2MCQ1 Mark

Which of the following regions of a transistors are, respectively, heavily dopped and lightly dopped?

A
Emitter and collector
B
Collector and emitter
C
Base and emitter
✓
Emitter and base

Answer: D.

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Q 3MCQ1 Mark

In Bohr model$,$ speed of electron in nth orbit of hydrogen atom is $........ \ (b =$ Planck's constant$, n =$ principal quantum number$, \in _0$ is the permittivity of free space$, e =$ electronic charge$)$

✓
$\frac{ e ^2}{2 \epsilon_0 hn }$
B
$\frac{ e ^2}{\epsilon_0 hn }$
C
$\frac{ e }{2 \in_0 hn }$
D
$\frac{ e }{\epsilon_0 hn }$

Answer: A.

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Q 4MCQ1 Mark

An electron of mass $'m\ '$ is rotating in first Bohr orbit of radius $'r\ '$ in hydrogen atom. The orbital acceleration of the electron in first orbit $(h =$ Planck's constant$)$.