NEET 2024 Exam Paper - Jhajjar NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

An ideal inductor-resistor-battery circuit is switched on at

t = 0 s

$t=0~\text{s}$ . At time

t

$t$ , the current is

i = i_{0} (1 - e^{(- \frac{t}{τ})}) A

$i=i_0\left(1-e^{\left(-\frac{t}{\tau}\right)}\right)\text{A}$ , where

i_{0}

$i_0$ is the steady-state value. The time at which the current becomes

0.5 i_{0}

$0.5i_0$ is: [Given

ln (2) = 0.693

$\text{ln}(2)= 0.693$ ]
1.

6.93 \times 10^{3} s

$6.93 \times 10^3 ~\text{s}$
2.

6.93 ms

$6.93~\text{ms}$
3.

69.3 s

$69.3~\text{s}$
4.

6.93 s

$6.93~\text{s}$

Subtopic: LR circuit |

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Q2:

The percentage errors in the measurement of mass and momentum of an object are

1 %

$1\%$ and

2 %

$2\%$ respectively. The percentage error in the measurement of kinetic energy of the object will be:
1.

1 %

$1\%$
2.

3 %

$3\%$
3.

4 %

$4\%$
4.

5 %

$5\%$

Subtopic: Errors |

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Q3:

Two identical rectangular plane sheet

A

$A$ and

B

$B$ each of surface charge density

ε_{0} {Cm}^{- 2}

$\varepsilon_0~ \text{Cm}^{-2}$ are placed parallel to each other as shown in figure. The electric field at the mid point

P

$P$ will be:

1.	$2 ~\text{NC}^{-1}$	2.	$1~\text{NC}^{-1}$
3.	$0.5~\text{NC}^{-1}$	4.	zero

Subtopic: Electric Field |

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Q4:

Match List-I with List-II:

	List-I (Application of Gauss Law)		List-II (Value of $\|E\|$ )
A.	The field inside a thin shell	I.	$\dfrac{\lambda}{2 \pi \varepsilon_0 r} \hat{n}$
B.	The field outside a thin shell	II.	$\dfrac{q}{4 \pi \varepsilon_0 R^2} \hat{r}$
C.	The field of thin shell at the surface	III.	$\dfrac{q}{4 \pi \varepsilon_0 r^2} \hat{r}$
D.	The field due to a long charged wire	IV.	zero

(Here symbols have their usual meaning and

R

$R$ is the radius of the thin shell)

Choose the correct answer from the options given below:

1.	A-IV, B-III, C-I, D-II
2.	A-I, B-II, C-III, D-IV
3.	A-IV, B-III, C-II, D-I
4.	A-I, B-III, C-II, D-IV

Subtopic: Gauss's Law |

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Q5:

In Young's double slit experiment, if the wavelength of light used is increased (say from violet to red) then the:

1.	fringe width decreases.
2.	fringe width increases.
3.	central bright fringe becomes dark.
4.	fringe width remains unaltered.

Subtopic: Young's Double Slit Experiment |

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Q6:

The value of

R

$R$ in the given circuit when there is no current in the

5 Ω

$5 ~\Omega$ resistor is:

1.	$12~\Omega$	2.	$9~ \Omega$
3.	$3~ \Omega$	4.	$2~ \Omega$

Subtopic: Wheatstone Bridge |

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Q7:

A wire of length

L

$L$ and radius

r (r ≪ L)

$r(r\ll L)$ is kept floating on the surface of a liquid of density

ρ .

$\rho.$ The maximum radius of the wire for which it may not sink is:
(the surface tension of liquid is

T

$T$ )

1.	$\sqrt { \dfrac{T}{\rho g}}$	2.	$\sqrt { \dfrac{2T}{\rho g}}$
3.	$\sqrt{\dfrac{2T\rho}{\pi g}}$	4.	$\sqrt{\dfrac{2T} {\pi \rho g}}$

Subtopic: Surface Tension |

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Q8:

Match List-I with List-II (the symbols carry their usual meaning).

List-I		List-II
A.	$\oint \vec{E} \cdot d \vec{A}=\dfrac{Q}{\varepsilon_0}$	I.	Ampere-Maxwell's law
B.	$\oint \vec{B} \cdot d \vec{A}=0$	II.	Faraday's law
C.	$\oint \vec{E} \cdot d\vec{ l}=\dfrac{-d(\phi)}{d t}$	III.	Gauss's law of electrostatics
D.	$\oint \vec{B} \cdot d\vec{l}=\mu_0 i_c+ \mu_0 \varepsilon_0 \dfrac{d\left(\phi_E\right)}{d t}$	IV.	Gauss's law of magnetism

Choose the correct answer from the options given below:

1.	A-III, B-IV, C-II, D-I
2.	A-IV, B-III, C-II, D-I
3.	A-III, B-II, C-IV, D-I
4.	A-IV, B-I, C-III, D-II

Subtopic: Maxwell's Equations |

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Q9:

Match List- I with List- II.

	List-I (Measured values)		List-II (Significant figures)
A.	$0.001213$	I.	$2$
B.	$2.1 \times 10^{16}$	II.	$3$
C.	$3.70$	III.	$1$
D.	$3000$	IV.	$4$

Choose the correct answer from the options given below:

1.	A-III, B-II, C-I, D-IV
2.	A-III, B-I, CII, D-IV
3.	A-I, B-II, C-IV, D-III
4.	A-IV, B-I, C-II, D-III

Subtopic: Significant Figures |

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Q10:

Match List-I (Spectral Series) with List-II (corresponding wave number expressions).

	List-I (Series)		List-II (Wave number in $\text{cm}^{–1}$ )
A.	Balmer series	I.	$R\left(\dfrac{1}{1^2}-\dfrac{1}{n^2}\right)$
B.	Lyman series	II.	$R\left(\dfrac{1}{4^2}-\dfrac{1}{n^2}\right)$
C.	Brackett series	III.	$R\left(\dfrac{1}{5^2}-\dfrac{1}{n^2}\right)$
D.	Pfund series	IV.	$R\left(\dfrac{1}{2^2}-\dfrac{1}{n^2}\right)$

Choose the correct answer from the options given below:

1.	A-I, B-IV, C-III, D-II
2.	A-II, B-III, C-IV, D-I
3.	A-IV, B-I, C-II, D-III
4.	A-III, B-II, C-I, D-IV

Subtopic: Spectral Series |

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