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MHT-CET PCB 08 MHT - CET - MHT-CET PCB 08

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

Question types

MHT-CET PCB 08 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

MHT-CET PCB 08 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 a transistor, doping level in base is increased slightly, the collector current and base current respectively ______.
  • A
    increases slightly, decreases slightly
  • B
    decreases slightly, decreases slightly
  • ✓
    decreases slightly, increases slightly
  • D
    increases slightly, increases slightly

Answer: C.

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Q 2MCQ1 Mark
If $I _1, l _2, l _3$ are the lengths of the emitter, base and collector of a transistor, then ____________.
  • A
    $I_3<I_1<I_2$
  • B
    $I_3<I_2>I_1$
  • C
    $I_1=I_2=I_3$
  • ✓
    $I_3>I_1>I_2$

Answer: D.

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Q 3MCQ1 Mark
A radioactive substance of half-life 69.3 days is kept in a container. The time in which 80% of the substance will disintegrate will be ______

[take ln(5) = 1.61]

  • A
    16.1 days
  • ✓
    161 days
  • C
    1.61 days
  • D
    1610 days

Answer: B.

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Q 4MCQ1 Mark
When an electron in a hydrogen atom jumps from the third orbit to the second orbit, it emits a photon of wavelength 'λ'. When it jumps from the fourth orbit to third orbit, the wavelength emitted by the photon will be ______.
  • ✓
    `20/7lambda`
  • B
    `20/13lambda`
  • C
    `9/16lambda`
  • D
    `16/25lambda`

Answer: A.

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Q 5MCQ1 Mark
For an electron, discrete energy levels are characterised by ____________.
  • ✓
    Principal quantum number (n)
  • B
    Planck's constant (h)
  • C
    Radius (r)
  • D
    Rydberg's constant (R)

Answer: A.

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