The mean free path of electrons in a metal is \(4\times 10^{-8}~\text{m}\). The electric field which can give an average of \(2~\text{eV}\) energy to an electron in the metal will be in units of Vm-1:
1. \(8\times 10^{7}\)
1. \(8\times 10^{7}\)
2. \(5\times 10^{-11}\)
3. \(8\times 10^{-11}\)
4. \(5\times 10^{7}\)
Subtopic: Electric Field |
Level 3: 35%-60%
AIPMT - 2009
Hints
Links
The number of photoelectrons emitted for the light of a frequency (higher than the threshold frequency 0) is proportional to:
1. -0
2. threshold frequency (0)
3. intensity of light
4. frequency of light ()
Subtopic: Photoelectric Effect: Experiment |
79%
Level 2: 60%+
AIPMT - 2009
Hints
Links
Each of the two strings of lengths \(51.6~\text{cm}\) and \(49.1~\text{cm}\) is tensioned separately by \(20~\text{N}\) of force. The mass per unit length of both strings is the same and equals \(1~\text{g/m}.\) When both the strings vibrate simultaneously, the number of beats is:
| 1. | \(5\) | 2. | \(7\) |
| 3. | \(8\) | 4. | \(3\) |
Subtopic: Beats |
57%
Level 3: 35%-60%
AIPMT - 2009
Hints
Links
The ionization energy of the electron in the hydrogen atom in its ground state is \(13.6~\text{eV}\). The atoms are excited to higher energy levels to emit radiations of \(6\) wavelengths. The maximum wavelength of emitted radiation corresponds to the transition between:
| 1. | \(n= 3~\text{to}~n=2~\text{states}\) |
| 2. | \(n= 3~\text{to}~n=1~\text{states}\) |
| 3. | \(n= 2~\text{to}~n=1~\text{states}\) |
| 4. | \(n= 4~\text{to}~n=3~\text{states}\) |
Subtopic: Bohr's Model of Atom |
62%
Level 2: 60%+
AIPMT - 2009
Hints
Links
Four identical thin rods, each of mass \(M\) and length \(l\), form a square frame. The moment of inertia of this frame about an axis through the centre of the square and perpendicular to its plane is:
1. \(\frac{4}{3}Ml^2\)
2. \(\frac{2}{3}Ml^2\)
3. \(\frac{13}{3}Ml^2\)
4. \(\frac{1}{3}Ml^2\)
2. \(\frac{2}{3}Ml^2\)
3. \(\frac{13}{3}Ml^2\)
4. \(\frac{1}{3}Ml^2\)
Subtopic: Moment of Inertia |
77%
Level 2: 60%+
AIPMT - 2009
Hints
Links
In thermodynamic processes which of the following statements is not true?
| 1. | In an adiabatic process, the system is insulated from the surroundings. |
| 2. | In an isochoric process, pressure remains constant. |
| 3. | In an isothermal process, the temperature remains constant. |
| 4. | In an adiabatic process \(PV^\gamma=\mathrm{constant}.\) |
Subtopic: Types of Processes |
92%
Level 1: 80%+
AIPMT - 2009
Hints
The figure shows the elliptical orbit of a planet \(m\) about the sun \({S}.\) The shaded area \(SCD\) is twice the shaded area \(SAB.\) If \(t_1\) is the time for the planet to move from \(C\) to \(D\) and \(t_2\) is the time to move from \(A\) to \(B,\) then:
| 1. | \(t_1=3t_2\) | 2. | \(t_1=4t_2\) |
| 3. | \(t_1=2t_2\) | 4. | \(t_1=t_2\) |
Subtopic: Kepler's Laws |
74%
Level 2: 60%+
AIPMT - 2009
Hints
Links
Sodium has body-centered packing. The distance between the two nearest atoms is 3.7 Å. The lattice parameter is:
1. 6.8 Å
2. 4.3 Å
3. 3.0 Å
4. 8.5 Å
Subtopic: Density & Packing Fraction |
63%
Level 2: 60%+
AIPMT - 2009
Hints
A block of mass \(M\) is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has a force constant value of \(k\). The mass is released from rest with the spring initially unstretched. The maximum extension produced in the length of the spring will be:
1. \(Mg/k\)
2. \(2Mg/k\)
3. \(4Mg/k\)
4. \(Mg/2k\)
1. \(Mg/k\)
2. \(2Mg/k\)
3. \(4Mg/k\)
4. \(Mg/2k\)
Subtopic: Elastic Potential Energy |
72%
Level 2: 60%+
AIPMT - 2009
Hints
Links
A body, under the action of a force \(\overset{\rightarrow}{F} = 6 \hat{i} - 8 \hat{j} + 10 \hat{k}\), acquires an acceleration of 1 ms-2. The mass of this body must be:
1. 2 √10 kg
2. 10 kg
3. 20 kg
4. 10 √2 kg
Subtopic: Newton's Laws |
89%
Level 1: 80%+
AIPMT - 2009
Hints
Links
© 2026 GoodEd Technologies Pvt. Ltd.