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 |
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If \(\overrightarrow{E}\) and \(\overrightarrow{B}\) represent the electric field vector and magnetic field vector, respectively, in an electromagnetic wave then the direction of EM wave is along:
1. \(\overrightarrow{E}\)
2. \(\overrightarrow{B}\)
3. \(\overrightarrow{E}\times\overrightarrow{B}\)
4. \(\overrightarrow{B}\times\overrightarrow{E}\)
1. \(\overrightarrow{E}\)
2. \(\overrightarrow{B}\)
3. \(\overrightarrow{E}\times\overrightarrow{B}\)
4. \(\overrightarrow{B}\times\overrightarrow{E}\)
Subtopic: Properties of EM Waves |
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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 |
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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
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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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 \(c=3\times10^{8}~\text{ms}^{-1}\)]:
1. \(4.4~\text{eV}\)
2. \(7.103\times10^{-15}~\text{J}\)
3. \(1.9~\text{eV}\)
4. \(4.60~\text{eV}\)
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 |
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The junction between ovule and funicle is represented by :
| 1. | Nucellus | 2. | Integument |
| 3. | Chalaza | 4. | Hilum |
Subtopic: Pistil: Ovule |
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Match List I with List II relating to major features of embryonic development at different timings of pregnancy:
Choose the correct answer from the options given below:
1. A-III, B-IV, C-I, D-II
2. A-II, B-I, C-III, D-IV
3. A-II, B-IV, C-I, D-III
4. A-III, B-IV, C-II, D-I
| List-I (No. of weeks) |
List-II (Major features) |
||
| A. | After 4 weeks of pregnancy | I. | Eye-lids separate and eyelashes are formed |
| B. | After 12 weeks of pregnancy | II. | Heart is formed |
| C. | After 24 weeks of pregnancy | III. | Limbs and digits are developed |
| D. | After 8 weeks of pregnancy | IV. | External genital organs are well developed |
Choose the correct answer from the options given below:
1. A-III, B-IV, C-I, D-II
2. A-II, B-I, C-III, D-IV
3. A-II, B-IV, C-I, D-III
4. A-III, B-IV, C-II, D-I
Subtopic: Embryonic Development till Gastrulation | Fetal Development & Parturition |
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NEET - 2024
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If \(i\) is the angle of incidence and \(i'\) is the angle of emergence on a prism, then the relation between \(i\) and \(i'\) to obtain an angle of minimum deviation is:
1. \(i=i'\)
2. \(i>i'\)
3. \(i<i'\)
4. \(i=0\)
1. \(i=i'\)
2. \(i>i'\)
3. \(i<i'\)
4. \(i=0\)
Subtopic: Prisms |
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From NCERT
NEET - 2024
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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
In the light of the above statements, choose the correct answer from the options given below:
| Assertion A: | A glass tube partially filled with water represents an open organ pipe. |
| Reason R: | The open end corresponds to an antinode and the end in contact with water, to a node. |
| 1. | Both A and R are true and R is the correct explanation of A. |
| 2. | Both A and R are true and R is NOT the correct explanation of A. |
| 3. | A is true but R is false. |
| 4. | A is false but R is true. |
Subtopic: Travelling Wave on String |
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NEET - 2024
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The photochemical phase of photosynthesis include:
A. Oxygen release
B. Formation of NADPH
C. Use of ATP
D. Water splitting
E. Carboxylation
Choose the correct answer from the options given below:
1. C and E only
2. A, B and D only
3. B, C and E only
4. A, B, C and D only
A. Oxygen release
B. Formation of NADPH
C. Use of ATP
D. Water splitting
E. Carboxylation
Choose the correct answer from the options given below:
1. C and E only
2. A, B and D only
3. B, C and E only
4. A, B, C and D only
Subtopic: Light Reaction: Electron Transport |
66%
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