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 |
83%
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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%
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NEET - 2022
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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%
1. T : 20%, G : 30%
2. T : 30%, G : 20%
3. T : 30%, G : 30%
4. T : 20%, G : 20%
Subtopic: Nucleic Acid: Nucleotides |
84%
From NCERT
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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. | \(3 \times 10^{-8} \text{cos}\left(1.6 \times 10^3 x+48 \times 10^{10} t\right) \hat{i}~\text{ V/m}\) |
| 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. | \(9 \text{sin} \left(1.6 \times 10^3 {x}-48 \times 10^{10} {t}\right) \hat{{k}} ~~\text{V} / \text{m}\) |
| 4. | \(9 \text{cos} \left(1.6 \times 10^3 {x}+48 \times 10^{10} {t}\right) \hat{{k}}~~\text{V} / \text{m}\) |
Subtopic: Properties of EM Waves |
59%
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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 |
57%
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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 |
74%
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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 |
72%
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The equivalent resistance of the infinite network given below is:
1. \(2~\Omega\)
2. \((1+\sqrt2)~\Omega\)
3. \((1+\sqrt3)~\Omega\)
4. \((1+\sqrt5)~\Omega\)
1. \(2~\Omega\)
2. \((1+\sqrt2)~\Omega\)
3. \((1+\sqrt3)~\Omega\)
4. \((1+\sqrt5)~\Omega\)
Subtopic: Combination of Resistors |
55%
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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
1. \(5\) m
2. \(10\) m
3. \(20\) m
4. \(25\) m
Subtopic: Projectile Motion |
76%
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NEET - 2022
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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 |
67%
From NCERT
NEET - 2022
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