Identify the function which represents a non-periodic motion?
1.
\(e^{-\omega t} \)
2.
\(\text{sin}\omega t\)
3.
\(\text{sin}\omega t+\text{cos}\omega t\)
4.
\(\text{sin}(\omega t+\pi/4) \)
Subtopic: Types of Motion |
84%
Level 1: 80%+
NEET - 2022
Hints
Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I | List-II | ||
| (a) | Cellular barrier | (i) | Interferons |
| (b) | Cytokine barrier | (ii) | Mucus |
| (c) | Physical barrier | (iii) | Neutrophils |
| (d) | Physiological barrier | (iv) | HCI in gastric juice |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (ii) | (iii) | (i) | (iv) |
| 3. | (iii) | (iv) | (ii) | (i) |
| 4. | (iii) | (i) | (ii) | (iv) |
Subtopic: Details of Immunity |
89%
Level 1: 80%+
NEET - 2022
Hints
If A and C make 30% and 20% of DNA, respectively, what will be the percentage composition of T and G ?
| 1. | T : 20%, G : 30% | 2. | T : 30%, G : 20% |
| 3. | T : 30%, G : 30% | 4. | T : 20%, G : 20% |
Subtopic: Nucleic Acid: Nucleotides |
85%
Level 1: 80%+
NEET - 2022
Hints
The magnetic field of a plane electromagnetic wave
is given by,
\(\vec B=3\times10^{-8}\text{cos}(1.6\times10^3x+48\times10^{10}t)\hat j~\text{T}.\)
The associated electric field will be:
is given by,
\(\vec B=3\times10^{-8}\text{cos}(1.6\times10^3x+48\times10^{10}t)\hat j~\text{T}.\)
The associated electric field will be:
| 1. | \(3 \times 10^{-8} \cos\left(1.6 \times 10^3 x+48 \times 10^{10} t\right) \hat{i}~\text{ V/m} \) |
| 2. | \(3 \times 10^{-8} \text{sin} \left(1.6 \times 10^3 {x}+48 \times 10^{10} {t}\right) \hat{{i}}~ \text{V} / \text{m} \) |
| 3. | \(9 \sin \left(1.6 \times 10^3 {x}-48 \times 10^{10} {t}\right) \hat{{k}} ~~\text{V} / \text{m} \) |
| 4. | \(9 \cos \left(1.6 \times 10^3 {x}+48 \times 10^{10} {t}\right) \hat{{k}}~~\text{V} / \text{m} \) |
Subtopic: Properties of EM Waves |
63%
Level 2: 60%+
NEET - 2022
Hints
The incorrect statement about the property of a Zener diode is:
| 1. | Zener voltage remains constant at the breakdown. |
| 2. | It is designed to operate under reverse bias. |
| 3. | The depletion region formed is very wide. |
| 4. | \(\mathrm{p}\) and \(\mathrm{n}\) regions of the Zener diode are heavily doped. |
Subtopic: Applications of PN junction |
58%
Level 3: 35%-60%
NEET - 2022
Hints
A cell of EMF \(4~\text{V}\) and internal resistance \(0.5~\Omega\) is connected to a \(7.5~\Omega\) external resistance. The terminal potential difference of the cell is:
| 1. | \(3.75~\text{V}\) | 2. | \(4.25~\text{V}\) |
| 3. | \(4~\text{V}\) | 4. | \(0.375~\text{V}\) |
Subtopic: EMF & Terminal Voltage |
76%
Level 2: 60%+
NEET - 2022
Hints
Given below are two statements:
| Statement I: | In an AC circuit, the current through a capacitor leads the voltage across it. |
| Statement II: | In AC circuits containing pure capacitance only, the phase difference between the current and the voltage is \(\pi.\) |
| 1. | Both Statement I and Statement II are correct. |
| 2. | Both Statement I and Statement II are incorrect. |
| 3. | Statement I is correct but Statement II is incorrect. |
| 4. | Statement I is incorrect but Statement II is correct. |
Subtopic: Different Types of AC Circuits |
73%
Level 2: 60%+
NEET - 2022
Hints
The equivalent resistance of the infinite network given below is:
| 1. | \(2~\Omega\) | 2. | \((1+\sqrt2)~\Omega\) |
| 3. | \((1+\sqrt3)~\Omega\) | 4. | \((1+\sqrt5)~\Omega\) |
Subtopic: Combination of Resistors |
56%
Level 3: 35%-60%
NEET - 2022
Hints
A cricket ball is thrown by a player at a speed of \(20\) m/s in a direction \(30^\circ\) above the horizontal. The maximum height attained by the ball during its motion is: (Take \(g=10\) m/s2)
| 1. | \(5\) m | 2. | \(10\) m |
| 3. | \(20\) m | 4. | \(25\) m |
Subtopic: Projectile Motion |
77%
Level 2: 60%+
NEET - 2022
Hints
A closely packed coil having \(1000\) turns has an average radius of \(62.8 ~\text{cm}\). If the current carried by the wire of the coil is \(1~ \text{A},\) the value of the magnetic field produced at the centre of the coil will be nearly:
(permeability of free space = \(4 \pi \times 10^{-7}~ \text{H/m}\))
(permeability of free space = \(4 \pi \times 10^{-7}~ \text{H/m}\))
| 1. | \(10^{-1}~\text{T}\) | 2. | \(10^{-2}~\text T\) |
| 3. | \(10^{2}~\text T\) | 4. | \(10^{-3}~\text{T}\) |
Subtopic: Magnetic Field due to various cases |
68%
Level 2: 60%+
NEET - 2022
Hints
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