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2020 MHT-CET PCB SET - 03 MHT - CET - 2020 MHT-CET PCB SET - 03

Maharashtra Board - STD 12 Science - MHT - CET (MSBSHSE - English Medium). 200 questions in this chapter.

Question types

2020 MHT-CET PCB SET - 03 question types

200 questions across 1 question group — pick any mix to generate a MHT - CET paper with step-by-step answer keys.

200
Questions
1
Question groups
5
Question types
Sample Questions

2020 MHT-CET PCB SET - 03 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 which logic gate the following statement is true? The output is high if and only if all inputs are high.
  • A
    NOR
  • B
    OR
  • C
    NAND
  • ✓
    AND

Answer: D.

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Q 2MCQ1 Mark
In light emitting diode (LED), light is given out due to ______.
  • A
    emission of holes and electrons
  • B
    drifting of electrons
  • ✓
    recombination of holes and electrons
  • D
    diffusion of holes

Answer: C.

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Q 3MCQ1 Mark
Using Bohr's model, the orbital period of electron in hydrogen atom in nth orbit is $(ε_0 =$ permittivity of free space, $h =$ Planck's constant, $m =$ mass of electron and $e =$ electronic charge$)$
  • A
    $\frac{2 \varepsilon_0^2 n^3 h^3}{m e^4}$
  • ✓
    $\frac{4 \varepsilon_0^2 n^3 h^3}{m e^4}$
  • C
    $\frac{8 \varepsilon_0^2 n^3 h^3}{m e^4}$
  • D
    $\frac{2 \varepsilon_0 n^2 h^2}{m e^4}$

Answer: B.

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Q 4MCQ1 Mark
Angular speed of an electron in the ground state of hydrogen atom is $4 \times 10^{16} \ rad/s$. What is its angular speed in $4^{th}$​​​​​​​ orbit?
  • A
    $4.25 \times 10^{14} \ rad/s$
  • ✓
    $6.25 \times 10^{14} \ rad/s$
  • C
    $6.25 \times 10^{16} \ rad/s$
  • D
    $0.25 \times 10^{16} \ rad/s$

Answer: B.

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Q 5MCQ1 Mark
When a surface $1 cm$ thick is illuminated by light of wavelength ' $\lambda$ ', the stopping potential is ' $V_0$ '. When the same surface is illuminated by light of wavelength ' $3 \lambda$ ', the stopping potential is $\frac{ V _0}{6}$. The threshold wavelength for the metallic surface is
  • A
    2λ
  • B
    3λ
  • C
    4λ
  • ✓
    5λ

Answer: D.

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