2020 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

2020 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 detecting optical signals ______.

A
photodiode is used in forward bias
✓
photodiode is used in reverse bias
C
LED is used in forward bias
D
LED is used in reverse bias.

Answer: B.

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Q 2MCQ1 Mark

In Boolean algebra the output C and the inputs A and B are related as $C =\overline{ A \cdot B }$. The logic gate corresponding to this equation is ______.

A
NOT
✓
NAND
C
OR
D
AND

Answer: B.

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Q 3MCQ1 Mark

Ratio of centripetal acceleration for an electron revolving in $3^{rd}$ orbit to $5^{th}$ orbit of hydrogen atom is $......$

✓
$\frac{625}{81}$
B
$\frac{775}{61}$
C
$\frac{125}{4}$
D
$\frac{424}{21}$

Answer: A.

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Q 4MCQ1 Mark

Let the series limit for Balmer series be $'\lambda _1\ '$ and the longest wavelength for Brackett series be $'\lambda _2\ '.$ Then $\lambda _{1 }$ and $\lambda _{2 }$ are related as $.......$

A
$\lambda _{1 }= 0.09 \ \lambda _2$
✓
$\lambda _{2 }= 0.09 \ \lambda _1$
C
$\lambda _{2 }= 1.11 \ \lambda _1$
D
$\lambda _{1 }= 1.11 \ \lambda _2$

Answer: B.

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Q 5MCQ1 Mark

Photoelectrons are emitted from a photosensitive surface for the light of wavelengths $\lambda _1 = 360 \ nm$ and $\lambda _2 = 600 \ nm.$ What is the ratio of work functions for lights of wavelength $'\lambda _1\ '$ to $'\lambda _2\ '$ ?

A
$6 : 1$
B
$1 : 6$
C
$3 : 5$
✓
$5 : 3$

Answer: D.

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