NEET 2023 Exam Paper NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

For Young's double-slit experiment, two statements are given below:

Statement I:	If screen is moved away from the plane of slits, angular separation of the fringes remains constant.
Statement Ii:	If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.

1.	Statement I is False but Statement II is True.
2.	Both Statement I and Statement II are True.
3.	Both Statement I and Statement II are False.
4.	Statement I is True but Statement II is False.

Subtopic: Young's Double Slit Experiment |

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Q2:

The ratio of frequencies of fundamental harmonic produced by an open pipe to that of closed pipe having the same length is:

1.	$3:1$	2.	$1:2$
3.	$2:1$	4.	$1:3$

Subtopic: Standing Waves |

61%

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Q3:

The ratio of the radius of gyration of a solid sphere of mass

M

$M$ and radius

R

$R$ about its own axis to the radius of gyration of the thin hollow sphere of the same mass and radius about its axis is:
1.

5 : 2

$5:2$
2.

3 : 5

$3:5$
3.

5 : 3

$5:3$
4.

2 : 5

$2:5$

Subtopic: Moment of Inertia |

67%

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Q4:

An AC source is connected to a capacitor

C

$C$ . Due to decrease in its operating frequency:

1.	capacitive reactance remains constant
2.	capacitive reactance decreases.
3.	displacement current increases.
4.	displacement current decreases.

Subtopic: Different Types of AC Circuits |

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Q5:

In hydrogen spectrum, the shortest wavelength in the Balmer series is

λ

$\lambda$ . The shortest wavelength in the Bracket series is:
1.

16 λ

$16\lambda$
2.

2 λ

$2\lambda$
3.

4 λ

$4\lambda$
4.

9 λ

$9\lambda$

Subtopic: Spectral Series |

63%

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Q6:

Resistance of a carbon resistor determined from colour codes is

(22000 \pm 5 %) Ω

$(22000 \pm 5 \%) ~\Omega$ . The colour of third band must be:
1. Yellow
2. Red
3. Green
4. Orange

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Q7:

A vehicle travels half the distance with speed

v

$v$ and the remaining distance with speed

2 v .

$2v.$ Its average speed is:
1.

\frac{3 v}{4}

$\frac{3v}{4}$
2.

\frac{v}{3}

$\frac{v}{3}$
3.

\frac{2 v}{3}

$\frac{2v}{3}$
4.

\frac{4 v}{3}

$\frac{4v}{3}$

Subtopic: Average Speed & Average Velocity |

69%

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Q8:

The potential energy of a long spring when stretched by

2 cm

$2~\text{cm}$ is

U .

$U.$ If the spring is stretched by

8 cm,

$8~\text{cm},$ the potential energy stored in it will be:

1.	$16U$	2.	$2U$
3.	$4U$	4.	$8U$

Subtopic: Elastic Potential Energy |

75%

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Q9:

A bullet is fired from a gun at the speed of

280 {ms}^{- 1}

$280~\text{ms}^{-1}$ in the direction

30^{\circ}

$30^\circ$ above the horizontal. The maximum height attained by the bullet is:

(g = 9.8 {m/s}^{2}, \sin 30^{\circ} = 0.5)

$\left(g=9.8~\text{m/s}^{2}, \sin30^{\circ}=0.5\right)$

1.	$3000~\text{m}$	2.	$2800~\text{m}$
3.	$2000~\text{m}$	4.	$1000~\text{m}$

Subtopic: Projectile Motion |

66%

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Q10:

The half-life of a radioactive substance is

20

$20$ minutes. In how much time, the activity of substance drops to

(\frac{1}{16})^{t h}

$(\frac{1}{16})^{\mathrm{th}}$ of its initial value?
1.

80

$80$ minutes
2.

20

$20$ minutes
3.

40

$40$ minutes
4.

60

$60$ minutes

54%

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