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MHT CET Physics Model Test 04 MHT - CET - MHT CET Physics Model Test 04

Maharashtra Board - STD 12 Science - MHT - CET (MSBSHSE - English Medium). 50 questions in this chapter.

Question types

MHT CET Physics Model Test 04 question types

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

50
Questions
1
Question groups
5
Question types
Sample Questions

MHT CET Physics Model Test 04 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
A semiconductor diode rectifier ______.
  • A
    amplifies A.C. signals
  • B
    amplifies D.C. signals
  • ✓
    converts A.C. into D.C.
  • D
    converts D.C. into A.C.

Answer: C.

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Q 2MCQ1 Mark
Most excited states of an atom have life times of about ____________.
  • ✓
    $10^{-8} \mathrm{~s}$
  • B
    $10^{-3} \mathrm{~s}$
  • C
    $10 \mathrm{~s}$
  • D
    $1 \mathrm{~s}$

Answer: A.

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Q 3MCQ1 Mark
What is the de Broglie wavelength of an electron of energy 180 eV ?(Mass of electron $=9 \times 10^{-31} \mathrm{~kg}$ and Planck's constant $\left.=6.6 \times 10^{-34} \mathrm{Js}.\right)$
  • A
    1.3 Å
  • B
    0.5 Å
  • ✓
    0.9 Å
  • D
    1.8 Å

Answer: C.

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Q 4MCQ1 Mark
If $\lambda_1$ and $\lambda_2$ are de-Broglie wavelengths for electrons in first and second Bohr orbits in hydrogen atom, then the ratio $\lambda_2$ to $\lambda_1$ is $\left(E_1=-13.6 \mathrm{eV}\right)$ ____________.
  • A
    4 : 1
  • B
    8 : 1
  • ✓
    2 : 1
  • D
    16 : 1

Answer: C.

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Q 5MCQ1 Mark
The work function of a metal is $1.6 \times 10^{-19} J$. When the metal surface is illuminated by the light of wavelength $6400 \mathring A$, then the maximum kinetic energy of emitted photo-electrons will be (Planck's constant $h =6.4 \times 10^{-34} Js$ )...........
  • A
    $2.8 \times 10^{-19} J$
  • ✓
    $1.4 \times 10^{-19} J$
  • C
    $1.4 \times 10^{-19} ev$ 
  • D
    $14 \times 10^{-19} J$

Answer: B.

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