MHT-CET PCB 10 - Maharashtra Board STD 12 Science MHT - CET Questions

200

Questions

1

Question groups

5

Question types

01

MCQ

200 Q→

Sample Questions

MHT-CET PCB 10 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

In the case of transistor, the relation between current ratios $\alpha_{ dc }$ and $\beta_{ dc }$ is ______.

A
$`beta_"dc"=(1-alpha_"dc")/alpha_"dc"`$
✓
$`beta_"dc"=alpha_"dc"/(1-alpha_"dc")`$
C
$`beta_"dc"=(1+alpha_"dc")/alpha_"dc"`$
D
$`beta_"dc"=alpha_"dc"/(1+alpha_"dc")`$

Answer: B.

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Q 2MCQ1 Mark

In switching circuit, transistor is in ON state and values of $I _{ C }$ and $I _{ B }$ are 4.2 mA and $5 \mu A$ respectively and $R _{ C }=1$ $k^{\prime} O$ mega and $R _{ B }=300 k ^{\prime}$ Omega'. If $V _{ BE }=0.5 V$, find the value of $V _{ BB }$.

✓
2 V
B
5 V
C
5.5 V
D
2.5 V

Answer: A.

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Q 3MCQ1 Mark

After 1 hour, `(1/8)^"th"` of the initial mass of a certain radioactive isotope remains undecayed. The half-life of the isotopes is ______.

A
40 minutes
B
10 minutes
✓
20 minutes
D
80 minutes

Answer: C.

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Q 4MCQ1 Mark

The radius of germanium (Ge) nuclide is measured to be twice the radius of `""^9""_4"Be"`. The number of nucleons in Ge will be ____________.

A
75
✓
72
C
73
D
74

Answer: B.

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Q 5MCQ1 Mark

When an electron in hydrogen atom jumps from third excited state to the ground state, the de-Broglie wavelength associated with the electron becomes ____________.

A
`(1/3)^"rd"`
B
`(2/3)^"rd"`
✓
`(1/4)^"th"`
D
half

Answer: C.

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