All India Engineering / Architecture Entrance Examination (AIEEE)

CBSE Guess > AIEEE > AIEEE Papers > Physics

AIEEE 2008 Physics

Q. 1. This question contains Statement-1 and Statement -2. Of the four choices given after the statements, choose the one that best describes the two statements.

Statement - 1: Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion. and

Statement - 2: For heavy nuclei, binding energy per nucleon increases with increasing Z while for light nuclei it decreases with increasing Z.

1. Statement - 1 is true, Statement- 2 is true; Statement -2 is not a correct explanation for Statement-1
2. Statement - 1 is true, Statement- 2 is false
3. Statement - 1 is false, Statement- 2 is true
4. Statement - 1 is true, Statement- 2 is true; Statement -2 is a correct explanation for Statement-1

Sol: Correct answer is (2)

Q. 2. This question contains Statement-1 and Statement -2. Of the four choices given after the statements, choose the one that best describes the two statements.

Statement - 1: For a mass M kept at the centre of a cube of side „a‟ the flux of gravitational field passing through its sides is and

Statement - 2: If the direction of a field due to a point source is radial and its dependence on the distance 'r' from the source is given as , its flux through a closed surface depends only on the strength of the source enclosed by the surface and not on the size or shape of the surface.

1. Statement - 1 is true, Statement- 2 is true; Statement -2 is not a correct explanation for Statement-1
2. Statement - 1 is true, Statement- 2 is false
3. Statement - 1 is false, Statement- 2 is true
4. Statement - 1 is true, Statement- 2 is true; Statement -2 is a correct explanation for Statement-1

Sol:

Q. 3. Two full turns of the circular scale of a screw gauge cover a distance of 1 mm on its main scale. The total number of divisions on circular scale is 50. Further, it is found that screw gauge has a zero error of - 0.03mm. While measuring the diameter of a thin wire, a student notes the main scale reading of 3mm and the number of circular scale divisions in line with the main scale as 35. The diameter of wire is

1. 3.67 mm
2. 3.38 mm
3. 3.32 mm
4. 3.73 mm

Sol:

Q. 4. An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has volume V₁ and contains ideal gas at pressure P₁ and temperature T₁. The other chamber has volume V₂ and contains ideal gas at pressure P₂ and temperature T₂. If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be

Sol:

Q. 5. A student measures the focal length of a convex lens by putting an object pin at a distance 'u' from the lens and measuring the distance'v' of the image pin. The graph between''u' and 'v' plotted by the student should look likes.

Sol:

Directions: Questions No. 76 and 77 are based on the following paragraph

Consider a block of conducting material of resistivity 'p' shown in the figure. Current 'I' enters at 'A' and leaves from 'D'. We apply superposition principal to find voltage ''developed between 'B' and 'C'. The calculation is done in the following steps:'

1. Take current 'I' entering from 'A' and assume it to spread over a hemispherical surface in the block.
2. Calculate field E(r) at distance 'r' from A by using Ohm's law E = 'j' where 'j' is the current per unit area at 'r'.
3. From the-r' dependence of E(r), obtain the potential V(r) at 'r'.
4. Repeat (i), (ii) and (iii) for current 'I' leaving 'D' and superpose results for'A' and 'D'.

Q. 76. measured between B and C is

Sol:

Q. 7. For current entering at A, the electric field at a distance 'r' from A is

Sol: Correct answer is (1)

Q. 8. Consider a uniform square plate of side 'a' and mass 'm'. The moment of inertia of this plate about an axis perpendicular to its plane and passing through one of its corners is

Sol:

Q. 9. An experiment is performed to find the refractive index of glass using a travelling microscope. In this experiment distances are measured by

1. a meter scale provided on the microscope
2. a screw gauge provided on the microscope
3. a vernier scale provided on the microscope
4. a standard laboratory scale.

Sol: Correct answer is (3)

Q. 10. A horizontal overhead powerline is at a height of 4m from the ground and carries a current of 100 A from east to west. The magnetic field directly below it on the ground is

Sol:

Q. 11. The speed of sound in oxygen (O₂) at a certain temperature is 460 ms^-1. The speed of sound in helium (He) at the same temperature will be (assume both gases to be ideal)

1. 650 ms^-1
2. 330 ms^-1
3. 460 ms^-1
4. 500 ms^-1

Sol:

Q. 12. A 5V battery with internal resistance and a 2V battery with internal resistance are connected to a resistor as shown in the figure. The current in the resistor is

1. 0.03 A P₂ to P1
2. 0.27 A P₁ to P₂
3. 0.27 A P₂ to P₁
4. 0.03 A P₁ to P₂

Sol: