Which of the following statements is not true?
| 1. | The coefficient of viscosity is a scalar quantity. |
| 2. | Surface tension is a scalar quantity. |
| 3. | Pressure is a vector quantity. |
| 4. | Relative density is a scalar quantity. |
Subtopic: Pressure |
72%
Level 2: 60%+
NEET - 2023
Hints
A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction of fields, then the electron:
| 1. | will turn towards right of direction of motion |
| 2. | will turn towards left of direction of motion |
| 3. | speed will decrease |
| 4. | speed will increase |
Subtopic: Lorentz Force |
65%
Level 2: 60%+
NEET - 2023
Hints
A horizontal ray of light is incident on the right-angled prism with prism angle \(6^\circ.\) If the refractive index of the material of the prism is \(1.5,\) then the angle of emergence will be:
| 1. | \(9^\circ\) | 2. | \(10^\circ\) |
| 3. | \(4^\circ\) | 4. | \(6^\circ\) |
Subtopic: Prisms |
64%
Level 2: 60%+
NEET - 2023
Hints
A \(\mathrm{p} \text-\)type extrinsic semiconductor is obtained when Germanium is doped with:
1. antimony
2. phosphorous
3. arsenic
4. boron
1. antimony
2. phosphorous
3. arsenic
4. boron
Subtopic: Types of Semiconductors |
76%
Level 2: 60%+
NEET - 2023
Hints
If \(Z_1\) and \(Z_2\) are the impedances of the given circuits \(\mathrm{(a)}\) and \(\mathrm{(b)}\) as shown in the figures, then choose the correct option:
| 1. | \(Z_1<Z_2\) | 2. | \(Z_1+Z_2=20~\Omega\) |
| 3. | \(Z_1=Z_2\) | 4. | \(Z_1>Z_2\) |
Subtopic: Different Types of AC Circuits |
67%
Level 2: 60%+
NEET - 2023
Hints
The wavelength of the Lyman series of hydrogen atom appears in:
| 1. | visible region |
| 2. | far infrared region |
| 3. | ultraviolet region |
| 4. | infrared region |
Subtopic: Spectral Series |
82%
Level 1: 80%+
NEET - 2023
Hints
The de-Broglie wavelength associated with an electron, accelerated by a potential difference of \(81\) V is given by:
1. \(13.6\) nm
2. \(136\) nm
3. \(1.36\) nm
4. \(0.136\) nm
1. \(13.6\) nm
2. \(136\) nm
3. \(1.36\) nm
4. \(0.136\) nm
Subtopic: De-broglie Wavelength |
58%
Level 3: 35%-60%
NEET - 2023
Hints
The maximum kinetic energy of the emitted photoelectrons in the photoelectric effect is independent of the:
| 1. | work function of material |
| 2. | intensity of incident radiation |
| 3. | frequency of incident radiation |
| 4. | wavelength of incident radiation |
Subtopic: Photoelectric Effect: Experiment |
80%
Level 1: 80%+
NEET - 2023
Hints
Two particles \(A\) and \(B\) initially at rest, move toward each other under the mutual force of attraction. At an instance when the speed of \(A\) is \(v\) and speed of \(B\) is \(3v,\) the speed of the centre-of-mass will be:
1. \(2v\)
2. zero
3. \(v\)
4. \(4v\)
1. \(2v\)
2. zero
3. \(v\)
4. \(4v\)
Subtopic: Center of Mass |
70%
Level 2: 60%+
NEET - 2023
Hints
A charge \(Q~\mu\text{C}\) is placed at the centre of a cube. The flux coming out from any one of its faces will be (in SI units):
| 1. | \(\dfrac{Q}{\varepsilon_0}\times10^{-6}\) | 2. | \(\dfrac{2Q}{3\varepsilon_0}\times10^{-3}\) |
| 3. | \(\dfrac{Q}{6\varepsilon_0}\times10^{-3}\) | 4. | \(\dfrac{Q}{6\varepsilon_0}\times10^{-6} \) |
Subtopic: Gauss's Law |
78%
Level 2: 60%+
NEET - 2023
Hints
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