AIIMS MBBS Entrance Test 2019 Physics Paper with Answer & Solutions 25 May First Shift Part 11

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Q-52: Assertion: In ionospheric reflection, phase change does not Occurs with the light wave.

Reason: The ionosphere reflection is similar to the total internal reflection is similar to the total internal reflection in miraj.

Options:

(1) If both assertion and reason are true and reason is the correct explanation of assertion.

(2) If both assertion and reason are true but reason is not the correct explanation of assertion.

(3) If assertion is true but reason is false.

(4) If both assertion and reason are false.

Answer: (1)

Solutions:

In, the reflection occurs from a rarer medium, so the reflected ray does not get inverted in phase.

Q-53: Assertion: There is no loss in energy in elastic collision

Reason: Linear momentum is conserved in elastic collision

(1) If both assertion and reason are true and reason is the correct explanation of assertion.

(2) If both assertion and reason are true but reason is not the correct explanation of assertion.

(3) If assertion is true but reason is false.

(4) If both assertion and reason are false.

Answer: (2)

Q-54: Assertion: In both radioactivity and photoelectric effect, electrons may be ejected.

Reason: In photoelectric effect and radio activity emission occurs only of unstable elements.

(1) If both assertion and reason are true and reason is the correct explanation of assertion.

(2) If both assertion and reason are true but reason is not the correct explanation of assertion.

(3) If assertion is true but reason is false.

(4) If both assertion and reason are false.

Answer: (3)

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