AIIMS MBBS Entrance Test 2019 Physics Paper with Answer & Solutions 26 May First Shift Part 6

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Q-21: A conducting and closed container of capacity contains an ideal gas at a high pressure. Now using a pump, the gas is taken out at a constant rate of. Find the time taken in which the pressure will decrease to initial ? (Assume isothermal condition)

Options:

(1)

(2)

(3)

(4)

Answer: (2)

Solutions:

Image contains an ideal gas at high pressure

Image Contains an Ideal Gas at High Pressure

The gas is taken out at the rate of. The volume of gas ejected in ‘’ time is Moles of gas ejected

Q-22: How can we change a camera from?

(1) Increase the aperture to keeping the focal distance constant.

(2) Increase the aperture to keeping the focal distance constant.

(3) Increase the aperture to time keeping the focal distance constant.

(4) Increase the aperture to time keeping the focal distance constant.

Answer: (4)

Solutions:

F-number of a camera

For camera, F number is so

Q-23: Force on current carrying loop in uniform magnetic (B) field which is at an angle with the normal will be:-

(1) Zero

(2)

(3)

(4)

Answer: (1)

Solutions:

Force on current carrying loop in uniform magnetic field is always zero.

Q-24:

Assertion: Sometimes insects can walk on water.

Reason: The gravitational force on insect is balanced by force due surface tension.

Answer: (1)

Q-25:

Assertion: Incoming light reflected by earth is partially polarized.

Reason: Atmospheric particle polarize the light.

Answer: (1)

Q-26:

Assertion: Photodiode and solar cell work on same mechanism.

Reason: Area is large for solar cell.

Answer: (2)

Q-27:

Assertion: isotope does not undergo fusion of the type as it is rarely found in nature.

Reason: has half life of years.

Answer: (2)

Q-28:

Assertion: Macro properties of gas are affected with increase in height.

Reason: These properties of gases depend on thermodynamic parameters.

Answer: (4)

Q-29:

Assertion: and of gaseous molecules is nearly of the order of velocity of sound.

Reason: The sound travels in air because of Vibrational molecular motion.

Answer: (2)

Q-30:

Assertion: The kinetic energy does not change when a particle moves in uniform magnetic field.

Reason: The velocity of the particle is not affected by magnetic field.

Answer: (1)

Q-31:

Assertion: For revolving electron, direction of angular momentum and magnetic moment are opposite.

Reason: Charge of electron is negative

Answer: (1)

Q-32:

Assertion: A metallic surface is moved in and out in magnetic field then emf is induced in it.

Reason: Eddy current will be produced in a metallic surface moving in and out of magnetic field.

Answer: (1)

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