An ideal inductor-resistor-battery circuit is switched on at \(t=0~\text{s}\). At time \(t\), the current is \(i=i_0\left(1-e^{\left(-\frac{t}{\tau}\right)}\right)\text{A}\), where \(i_0\) is the steady-state value. The time at which the current becomes \(0.5i_0\) is: [Given \(\text{ln}(2)= 0.693\)]
1. \(6.93 \times 10^3 ~\text{s}\)
2. \(6.93~\text{ms}\)
3. \(69.3~\text{s}\)
4. \(6.93~\text{s}\)
Subtopic: LR circuit |
60%
From NCERT
NEET - 2024
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Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below:
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.
| Statement I: | Bacterial infection by Bacillus thuringiensis can kill only caterpillar larvae. |
| Statement II: | B. thuringiensis cannot kill adult moths. |
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: Microbes in Biocontrol Agent |
57%
From NCERT
NEET - 2024
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options give below:
| Statement I: | Benzoic acid produces effervescence on treatment with aq. \(\mathrm{NaHCO}_3\) |
| Statement II: | The effervescence is due to the release of hydrogen gas. |
| 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: Carboxylic Acids: Preparation & Properties |
63%
From NCERT
NEET - 2024
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The percentage errors in the measurement of mass and momentum of an object are \(1\%\) and \(2\%\) respectively. The percentage error in the measurement of kinetic energy of the object will be:
| 1. | \(1\%\) | 2. | \(3\%\) |
| 3. | \(4\%\) | 4. | \(5\%\) |
Subtopic: Errors |
66%
From NCERT
NEET - 2024
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In plants, sucrose is converted into two molecules of monosaccharides due to action of invertase and then both enter the glycolytic pathway. Identify the monosaccharides.
| 1. | Glucose and glucose | 2. | Glucose and fructose |
| 3. | Glucose and galactose | 4. | Fructose and galactose |
Subtopic: Glycolysis |
91%
From NCERT
NEET - 2024
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If \(F=\alpha t^2-\beta t\) is the magnitude of the force acting on a particle at an instant \(t\) then the time, at which the force becomes constant, is (where \(\alpha\) and \(\beta\) are constants):
| 1. | \(\dfrac{\beta}{\alpha}\) | 2. | \(\dfrac{\beta}{2\alpha}\) |
| 3. | \(\dfrac{2\beta}{\alpha}\) | 4. | zero |
Subtopic: Types of Forces |
69%
From NCERT
NEET - 2024
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If \(\vec{E}\) and \(\vec{B}\) represent the electric field vector and magnetic field vector, respectively, in an electromagnetic wave then the direction of EM wave is along:
| 1. | \(\vec{E}\) | 2. | \(\vec{B}\) |
| 3. | \(\vec{E}\times\vec{B}\) | 4. | \(\vec{B}\times\vec{E}\) |
Subtopic: Properties of EM Waves |
92%
From NCERT
NEET - 2024
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Given below are two statements:
In light of the above statements, choose the correct answer from the options given below.
1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true
| Statement I: | Two DNA sequences were prepared corresponding to A and B, chains of human insulin and were introduced in the plasmids of Agrobacterium to produce insulin chain. |
| Statement II: | Chain A and B were produced separately, extracted and combined by creating disulphide bonds to form human insulin. |
1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true
Subtopic: Med Applications & Humulin |
63%
From NCERT
NEET - 2024
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Two identical rectangular plane sheet \(A\) and \(B\) each of surface charge density \(\varepsilon_0~ \text{Cm}^{-2}\) are placed parallel to each other as shown in figure. The electric field at the mid point \(P\) will be:
| 1. | \(2 ~\text{NC}^{-1}\) | 2. | \(1~\text{NC}^{-1}\) |
| 3. | \(0.5~\text{NC}^{-1}\) | 4. | zero |
Subtopic: Electric Field |
79%
From NCERT
NEET - 2024
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Radiation of wavelength \(280~\text{nm}\) is used in an experiment of photoelectric effect with cathode of work function, \(2.5~\text{eV}.\) The maximum kinetic energy of the photoelectrons is:
(take \(h=6.62\times10^{-34}~\text{J s}\) and \(c=3\times10^{8}~\text{ms}^{-1}\))
(take \(h=6.62\times10^{-34}~\text{J s}\) and \(c=3\times10^{8}~\text{ms}^{-1}\))
| 1. | \(4.4~\text{eV}\) | 2. | \(7.103\times10^{-15}~\text{J}\) |
| 3. | \(1.9~\text{eV}\) | 4. | \(4.60~\text{eV}\) |
Subtopic: Einstein's Photoelectric Equation |
76%
From NCERT
NEET - 2024
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